FMA1127. Touch Sensor Controller. Overview. Features. Applications

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1 FMA2 Touch Sensor Controller Overview The FMA2 is a low-power, compact, flexible touch sensor controller that converts capacitance generated between the human body and a conductive touch pad to digital data without any analog signal processing. Its programmability increases design flexibility and gives better performance and stability for a broad range of applications.the FMA2 s Automatic Impedance Calibration (AIC ) function can be easily configured to support different sensitivities for individual channels independently as well as to change values of parameters, such as calibration intervals. AIC may also be temporarily paused and resumed by a host MCU. Among the many new features of the FMA2 is Adjacent Pattern Interference Suppression (APIS ). APIS is a filtering function that eliminates adjacent key or pattern interference. The FMA2 also gives touch-strength output in addition to touch on/off output.there is a number of DIOs depending on the package type that can be configured and programmed to meet a customer s specific needs, giving customers even greater flexibility and value. The FMA2 comes with various package types to support different number of input channels and DIOs. The FMA2 touch sensor controller is developed and owned by ATLab Inc., South Korea, and is distributed by Fujitsu Microelectronics America, Inc. Features Patented full-digital architecture Supports 2 input channels (40QFN and 30SSOP) or input channels (32QFN and 24SSOP) or input channels (24QFN and SSOP) Programmable registers to characterize applications I 2 C interface with the host MCU Configurable Automatic Impedance Calibration (AIC ) Two types of interrupts (GINT for general purpose and TINT for touch detection) Touch Pad Zin Zref Impendance Change Detection Zin < Zref Touch Pad System Model Touch Pad Zin Zref Impendance Change Detection Touch Pad System Model Zin Zref Impedance Status Zin Zref Ztouch Touch Detected Impedance Status -bit resolution of touch strength data (2 steps) Three different modes for Adjacent Pattern Interference Suppression (APIS ). Configurable DIO pins as direct touch outputs, extended GPIOs, or external interrupt inputs. Beep generation for tactile feeling Idle and Sleep modes for power saving De-bounced touch outputs Applications Portable devices such as PDAs, cellular phones, MP3 players, remote controllers, and other integrated input devices Home appliances and consumer electronic products Computer input devices such as mice and keyboards

2 Touch Sensor Controller Table of Contents Ordering Information... Package Pinouts... Electrical Characteristics...3 Operation Principles...4 Touch Detection...4 AIC (Automatic Impedance Calibration)...4 APIS Touch Output...4 Functional Characteristics... Communication Specifications for I 2 C... Application Information pin Package (40QFN) pin Package (32QFN) pin Package (24QFN) pin Package (30SSOP) pin Package (24SSOP)... -pin Package (SSOP)... Power Connection...2 Tuning System...22 Hardware...22 Software...23 Register Map Summary...23 Package Dimensions...24 Revision History...30 Fujitsu 0 Microelectronics Fujitsu Microelectronics America, America, Inc. Inc.

3 FMA2 Ordering Information Product Code Package Type Package Dimension Pin Pitch Number of Sensor Inputs Number of Digital Outputs FMA2DA-40N 40QFN mm x mm x 0.mm 0.4mm 2 2 FMA2DA-32N 32QFN 4mm x 4mm x 0.mm 0.4mm FMA2DA-24N 24QFN 4mm x 4mm x 0.mm 0.mm 3 FMA2DA-30S 30SSOP 2.mm x 0.3mm x 2.mm 0.mm 2 FMA2DA-24S 24SSOP.2mm x.mm x 2.0mm 0.mm 3 FMA2DA-S SSOP.mm x.4mm x.mm 0.mm 2 Package Pinouts FMA2 40N FMA2 32N DIO_ DIO_0 TINT GINT TCLK TOSC S4 S VGG S S S S 3 32 S S0 S4 S VSS S S S S0 33 S 2 ID_ ID_0 DIO_ DIO_4 DIO_3 DIO_ CONFIG_0 CONFIG_ DIO_ DIO_ DIO_ DIO_ S S0 ID DIO_3 DIO_ CONFIG_0 CONFIG_ DIO_ DIO_ DIO_ DIO_ DIO_ DIO_0 TINT GINT BEEP TCLK DIO_ DIO_0 40-Pin QFN 32-Pin QFN FMA2 24N DIO_0 TINT GINT TCLK S4 VGG 2 S S S0 ID CONFIG_0 CONFIG_2 DIO_ DIO_2 24 TOSC 24-Pin QFN Fujitsu Microelectronics America, Inc.

4 Touch Sensor Controller 2 Fujitsu Microelectronics America, Inc. FMA2 24S 24-Pin SSOP SO ID DIO_0 TINT GINT TCLK VSS DIO_ DIO_ S S4 S S S S FMA2 30S 30-Pin SSOP ID DIO_ DIO_4 DIO_3 DIO_2 DIO_ DIO_0 TINT GINT TCLK VSS S0 S S4 S S S S S S0 S FMA2 S -Pin SSOP ID DIO_0 TINT GINT TCLK DIO_ S0 S VSS S S

5 Electrical Characteristics FMA2 Symbol Parameter Conditions Min. Typ. Max. Unit ABSOLUTE MAXIMUM RATINGS Tstg Storage Temperature -4 C Topr Operating Temperature C Hopr Operating Humidity % Power Supply Voltage should be higher than 3V when using internal LDO V Power Supply Voltage() V Vin Input Voltage V PH V RECOMMENDED OPERATING CONDITIONS Toprr Operating Temperature -3 2 C Vddp Power Supply Voltage () 2.4 V Vddc Power Supply Voltage () V Tr_i Digital Input Rising Time ns Tf_i Digital Input Falling Time ns AC ELECTRICAL SPECIFICATIONS (Typical values at Ta = 2 C and = 3.3V) fi Input frequency 2. KHz fsmp Sample frequency Hz Stch Touch Sensitivity 0.0 pf Rs_i Sensor Input Resistance 0 K¾ TCsr_i Tuning Capacitor in Aref or Sin PINs 0 0 pf Tr_o Output Rising Time Load = 00pF 0 0 ns Tf_o Output Falling Time Load = 00pF 0 0 ns DC ELECTRICAL SPECIFICATIONS (Typical values at Ta = 2 C and = 3.3V, using external 2.V LDO) Idd_a Supply Current (Active mode) μa Idd_i Supply Current (Idle mode) 0 30 μa Idd_ael Supply Current (Active mode) 0 0 μa When using an ext. 2.V LDO Idd_iel Supply Current (Idle mode) 0 0 μa Idd_aec Supply Current (Active mode) 0 3 μa When using ext. LDO and ext. Clock Idd_iec Supply Current (Idle mode) μa Idd_s Supply Current (Sleep mode) 0. μa Vil Digital Input Low Voltage 0. V Vih Digital Input High Voltage 0. x V Vol Digital Output Low Voltage 0. V Voh Digital Output High Voltage - 0. V Vldo Internal LDO Output Voltage V Ildo Internal LDO Driving Current ma Idr GPIO Driving Current 2 ma Fujitsu Microelectronics America, Inc. 3

6 Touch Sensor Controller Operation Principles Touch Detection The FMA2 touch sensor controller includes the Impedance Change Detection engine within the device. It detects the impedance difference between reference and sensor input. Touch Pad Touch Pad Ztouch Zin Zref Impendance Change Detection Zin Zref Zin Zref Impendance Change Detection Zin Zref Zin < Zref Touch Detected Touch Pad System Model Impedance Status Touch Pad System Model Impedance Status Figure : When a Pad is Not Touched. Figure 2: When a Pad is Touched. As shown in Figure, if the pad is not touched, the impedance of the sensor input Zin should be kept less than the impedance of the reference Zref. If the pad is touched, as shown in Figure 2, Zin is increased by Ztouch. When Ztouch by touching becomes greater than the difference of Zin and Zref in the not touched state, i.e., if Zin in touched state becomes greater than Zref by a value higher than 0.pF, the ICD (Impedance Change Detection) engine within the chip generates the acknowledged output signal indicating it senses the touch. IDC =, if Zin Zref > 0.pF 0, otherwise Notice the value of 0.pF or higher is needed to maintain stable output against various noises. The sensor input impedance, Zin, includes parasitic capacitance of the input line, tuning capacitance of input pin and on-chip input impedance, while Zref includes on-chip impedance, AIC control values and external tuning capacitance if necessary. AIC (Automatic Impedance Calibration) Automatic Impedance Calibration (AIC) maintains consistent sensitivity against external environmental changes such as temperature, supply voltage and current, humidity, and system-level variations. This helps users develop their applications more conveniently by providing the actual impedance value of each sensor input. For developers, a Tuning Viewer program is provided, which helps to optimize the PCB design and to decide AIC input parameters. More detailed information is available in the FM2 Tuning Guide. The ICD engine residing in the FMA2 controls reference impedance values for each sensor input pin by acquiring each input impedance data. It periodically updates all reference impedance values under the condition that all twelve touch pads remain in no-touched status. This auto-calibration function absorbs environmental changes and guarantees product stability. APIS Touch Output When touch pads are arranged too closely to each other, it is sometimes difficult to identify which pad is touched. APIS (Adjacent Pattern Interference Suppression) is a filtering function to identify which pads are intentionally touched. If APIS mode is not defined, all touch data without APIS filtering are transmitted to the MCU. For example, if the 4 Fujitsu Microelectronics America, Inc.

7 FMA2 application is a numeric keypad, the user can use the APIS mode to get the strongest output and filter out all other weakly touched inputs. Without APIS, the host may have to do this filtering function. APIS reduces the burden of the host computing time. There are three modes in APIS: APIS mode : reports the strongest output only (Figure 3). APIS mode 2: reports all outputs that exceeds pre-defined thresholds (value of Strength Threshold register) (Figure 4). APIS mode 3: reports two strongest outputs (suitable for multi-touch applications) (Figure ). All three modes are described in the Figures below. The red-colored circles and bars show the output API S Mode I Output Data 4 4 T ouch Interference Area strength 0 # * * 0 # Real Touch Output Touch Output by APIS I * 0 # API S Mo de II Output Data 4 4 T ouch Interference Area strength 0 # * * 0 # Strength Threshold Real Touch Output Touch Output by APIS II * 0 # API S Mo de III Output Data 4 4 T ouch Interference Area strength 0 # * * 0 # Real Touch Output Touch Output by APIS III * 0 # Fujitsu Microelectronics America, Inc.

8 Touch Sensor Controller Functional Characteristics Active to Idle Idle to Active Active to Sleep Idle to Sleep Sleep to Active System Clock:.MHz, Sensor Clock: khz 0.2 x A sec. Min: 2ns, Max: 0ms ns ns 0μs System Clock:.MHz, Sensor Clock: 0kHz 0. x A sec. Min: 2ns, Max: ms ns ns 0μs System Clock: 00kHz, Sensor Clock: 0kHz 0. x A sec. Min: 2ns, Max: ms ns ns 0μs System Clock: 00Hz, Sensor Clock: khz x A sec. Min: 2ns, Max: 40ms ns ns 0μs System Clock: 400kHz, Sensor Clock: khz x A sec. Min: 2ns, Max: 40ms ns ns 0μs System Clock: 400kHz, Sensor Clock: 2.kHz 2 x A sec. Min: 2ns, Max: 0ms ns ns 0μs System Clock: 0kHz, Sensor Clock: 2.kHz 2 x A sec. Min: 2ns, Max: 0ms ns ns 0μs System Clock: 0kHz, Sensor Clock:.2kHz 4 x A sec. Min: 2ns, Max: 0ms ns ns 0μs A = IDLE Time Register Value Fujitsu Microelectronics America, Inc.

9 FMA2 Communication Specifications for I 2 C Table : DC Electrical Specifications for I 2 C Bus Symbol Parameter Standard-Mode Fast-Mode Min. Max. Min. Max Unit V IL LOW Level Input Voltage: Fixed Input Levels V DD Related Input Levels V DD n/a -0. n/a 0.3 x V DD () V V V IH HIGH Level Input Voltage: Fixed Input Levels V DD Related Input Levels 3.0 (2) 0. x V DD (2) n/a n/a 0. x V DD (2) V V V hys Hysteresis of Schmitt Trigger Inputs: V DD > 2V V DD < 2V 3.0 (2) 0. x V DD (2) n/a n/a 0. x V DD (2) V V V OL V OL3 LOW Level Output Voltage (open drain or collector) at 3mA Sink Current: V DD > 2V V DD < 2V 0 n/a 0.4 n/a x V DD V V t of t sp Output Fall Time from V IHmin to V ILmax with a Bus Capacitance from 0pF to 400pF Pulse Width of Spike Which Must be Suppressed by the Input Filter 20(4) + 0.Cb(3) ns n/a n/a 0 0 ns I i Input Current each I/O Pin with an Input Voltage Between 0.V DD and 0.V V DDmax () 0 () μa C i Capacitance for Each I/O Pin 0 0 pf Note:. Devices that use non-standard supply voltages which do not conform to the intended I 2 C bus system levels must relate their input levels to the V DD voltage to which the pull-up resistors R p are connected. 2. Maximum V IH = V DDmax + 0.V. 3. C b = capacitance of one bus line in pf. 4. The maximum t f for the and bus lines quoted in Table 2 (300ns) is longer than the specified maximum t of for the output stages (20ns). The allows series protection resistors (R S ) to be connected between the / pins and the / bus lines as shown in Figure without exceeding the maximum specified for t f.. I/O pins of Fast-mode devices must not obstruct the and lines if V DD is switched off. n/a = not applicable Fujitsu Microelectronics America, Inc.

10 Touch Sensor Controller Table 2. AC Electrical Specifications for I2C Bus Symbol Parameter Standard-Mode Fast-Mode Min. Max. Min. Max Unit f Clock Frequency khz t HD:STA Hold Time (repeated) START Condition. After this Period, the First Clock Pulse is Generated μs t LOW LOW Period of the Clock 4..3 μs t HIGH HIGH Period of the Clock μs t SU:STA Setup Time for a Repeated START Condition μs t HD:DAT Data Hold Time: For CBUS Compatible Master For I 2 C Bus Devices.0 μs 2 (2) 3.4 (3) 0 (2) 0. (3) μs t SU:DAT Data Setup Time (4) ns t r Rise Time of Both and Signals C () b 300 ns t f Fall Time of Both and Signals C b () 300 ns t SU:STO Setup Time for STOP Condition μs f BUF Bus Free Time Between a STOP and START Condition 4..3 μs C b Capacitive Load for Each Bus Line pf V nl V nh Noise Margin at the LOW Level for Each Connected Device (including Hysteresis) Noise Margin at the HIGH Level for Each Connected Device (including Hysteresis) 0. x V DD 0. x V DD V 0.2 x V DD 0.2 x V DD V Notes:. All values referred to V IHmin and V ILmax levels (see Table ). 2. A device must internally provide a hold time of al least 300ns for the signal (referred to the V IHmin of the signal) to bridge the undefined regions of the falling edge of. 3. The maximum t HD:DAT has only to be met if the device does not stretch the LOW period (t LOW ) of the signal. 4. A Fast-mode I 2 C-bus device can be used in a Standard-mode I 2 C-bus system, but the requirement t SU:DAT Š 20ns must then be met. This will automatically be the case if the device does not stretch the LOW period of the signal. If such a device does stretch the LOW period of the signal, it must output the next data bit to the line t max + t SU:DAT =, =,20ns (according to the Standard-mode I 2 C bus specification) before the line is released.. C b = total capacitance of one bus line in pf. If mixed with Hs-mode devices, faster fall-times according the Table 2 are allowed. n/a = not applicable. t t SU:DAT f t t HD:STA t f r t LOW t SP t r t BUF t HD:STA t HD:DAT t HIGH t SU:STA t SU:STO S Sr P S Figure : Definition of Timing for F/S-mode Devices on the I2C-Bus Fujitsu Microelectronics America, Inc.

11 FMA2 Application Information Top View of 40-pin Package (40QFN) FMA2 40N S4 S VGG S S S 3 S S 32 S0 S0 33 S ID_ ID_0 DIO_ DIO_ CONFIG_0 CONFIG_ DIO_ DIO_ DIO_3 3 2 DIO_ DIO_2 40 DIO_ Pin Description DIO_ DIO_0 TINT GINT BEEP TCLK DIO_ DIO_0 Name IO Pin # Description I 34 Reset, active LOW TCLK I Test Clock Input S I ~23 2~33 Twelve Sensor Inputs from external Touch Pads. A_REF I Reference Input. DIO IO, 2, 4, 3 40 Configured by HOST: - extended GPIOs, Direct Button Outputs or External Interrupt inputs IO 3 Bidirectional I 2 C Data from/to Host I 4 I 2 C CLK from Host TINT O Touch Interrupt, it can be generated when touch status is changed. GINT O General Interrupts including touch interrupt, and they can be masked. BEEP O Beep Output. ID I 3,3 I2C Chip ID Select(00:0x, 0:0x, 0:0xA, :0xB) CONFIG I, MCU Control Mode or Fixed Register Mode (00:MCU Control Mode, 0: Fixed Mode-, 0: Fixed Mode-2, : Fixed Mode-3,) P 2 Power (2.3V~.V) O 2 2.V Regulator Power Output P 2 2.V Power Input VSS P 24 Ground Fujitsu Microelectronics America, Inc.

12 Touch Sensor Controller Typical Application Circuit VDD Touch PAD 0 Touch PAD 0~ From MCU 0K 0uF R C Touch PAD Data Sensor Tuning Cap 2 DIO_ DIO_ TINT GINT BEEP FM A2 40N TCLK 23 DIO_ 22 0 DIO_ Touch PAD 2 2K VDD R2 2K R3 DIO_2 DIO_3 DIO_4 DIO_ ID_0 ID_ S0 S S4 Touch PAD 3 MCU MCU MCU S VGG VDD Touch PAD 4 Touch PAD Touch PAD S S Touch PAD S DIO_ DIO_ DIO_ DIO_ CONFIG_0 CONFIG_ S S0 S Touch PAD Touch PAD Ref Se ns or Tunin g Cap Touch PAD 0 Touch PAD Notes: The voltage of Vdd can be in the range from 3V to V. The circuit above is a typical application circuit using an internal LDO. R and C are not necessary if MCU provides reset signal. 2k pull-up resistor for I 2 C communication can be eliminated if other device already uses it for I 2 C communication. LEDs can be directly attached to DIO ports for touch indications of 2 channels. Each DIO port can drive a current of 2mA. 0 Fujitsu Microelectronics America, Inc.

13 FMA2 Top View of 32-pin Package (32QFN) FMA2 32N DIO_ DIO_0 TINT GINT TCLK TOSC S4 S VSS S S S S0 ID DIO_3 DIO_ S CONFIG_0 CONFIG_ DIO_ DIO_ DIO_ DIO_ Pin Description Name IO Pin # Description I 2 Reset, active LOW TCLK I Test Clock Input S I, 23 2 Nine Sensor Inputs from external Touch Pads. I Reference Input. DIO IO,2, 2, 3, 32 Configured by HOST: - extended GPIOs, Direct Button Outputs or External Interrupt inputs IO 3 Bidirectional I2C Data from/to Host I 4 I 2 C CLK from Host TINT O Touch Interrupt, it can be generated when touch status is changed. GINT O General Interrupts including touch interrupt, and they can be masked. TOSC I Test Pin ID I 30 I2C Chip ID Select(0:0x, :0xB) CONFIG I 3,4 MCU Control Mode or Fixed Register Mode (00:MCU Control Mode, 0: Fixed Mode-, 0: Fixed Mode-2, : Fixed Mode-3,) P 22 Power (2.V~.V) O 2 2.V Regulator Power Output P 2.V Power Input VSS P Ground Fujitsu Microelectronics America, Inc.

14 Touch Sensor Controller Typical Application Circuit Data Sensor Tuning Cap Tou ch PA D To uch_se nsor _ To uch_se nsor _ To uch_se nsor _ Touch_Sensor_4 Touch_Sensor_ VCC (3V~V) 0nF Touch_Sensor_ Touch_Sensor_ To uch_se nsor _ To uch_se nsor _4 To uch_se nsor _3 To uch_se nsor _2 To uch_se nsor _ To uch_s ensor _3 To uch_se nsor _2 To uch_s ensor _ To uch_s ensor _0 RE SET_N S 2 S0 RESET ID 24 S4 23 S 22 2 VSS FMA2 32N S CON FIG_0 CON FIG_ DIO_ DIO_ Reference Sensor Tuning Cap To uch_se nsor _0 3 DIO_3 DIO_ 0 32 DIO 2 DIO_ Fr om M C U 0 K 0 uf R C VCC (3V~V) MCU Connect MCU Connect MCU Connect S S To uch_se nsor _ X pf DIO_ DIO_0 TINT GINT TCLK TOSC 2K 2K Notes: The voltage of Vcc can be in the range from 3V to V. The circuit above is a typical application circuit using an internal LDO. R and C are not necessary if MCU provides reset signal. 2k pull-up resistor for I 2 C communication can be eliminated if other device already uses it for I 2 C communication. LEDs can be directly attached to DIO ports for touch indications of channels. Each DIO port can drive a current of 2mA. 2 Fujitsu Microelectronics America, Inc.

15 FMA2 Top View of 24-pin Package (24QFN) FMA2 24N DIO_0 TINT GINT TCLK S4 VGG 2 S S S0 ID CONFIG_0 CONFIG_2 DIO_ DIO_2 24 TOSC Pin Description Name IO Pin # Description I 22 Reset, active LOW TCLK I Test Clock Input S I 2, -2 Nine Sensor Inputs from external Touch Pads. I Reference Input. DIO IO,, 24 Configured by HOST: - extended GPIOs, Direct Button Outputs or External Interrupt inputs IO 2 Bidirectional I2C Data from/to Host I 3 I 2 C CLK from Host TINT O 4 Touch Interrupt, it can be generated when touch status is changed. GINT O General Interrupts including touch interrupt, and they can be masked. ID I 23 I 2 C Chip ID Select(0:0x, :0xB) CONFIG I, 0 MCU Control Mode or Fixed Register Mode (00:MCU Control Mode, 0: Fixed Mode-, 0: Fixed Mode-2, : Fixed Mode-3,) P Power (2.V~.V) O 2.V Regulator Power Output P 4 2.V Power Input VSS P 3 Ground Fujitsu Microelectronics America, Inc. 3

16 Touch Sensor Controller Typical Application Circuit Touch PAD Touch_Sensor_ Touch_Sensor_ 3 Touch_Sensor_ 4 VCC(3~V) 4 0uF 3 Touch_Sensor_4 Touch_Sensor_3 Touch_Sensor_2 Touch_Sensor_ Touch_Sensor_2 Touch_Sensor_ Touch_Sensor_0 RESET_ N 2 22 S S0 RESET_ N S4 FMA2 24N V2 VSS S CONFIG_ CONFIG_ 0 2 Touch_Sensor_ 0 XpF Referenc e Sensor Tuning Cap Touch_Sensor_0 23 ID DIO_ Touch PAD 24 DIO_ 2 DIO_ 0 TINT GINT TCLK TOSC Data Sensor Tuning Cap From MCU 0 K 0uF R C RESET_ N VCC(3~V) 2K 2K MCU Connect MCU Connect MCU Connect Notes: The voltage of Vcc can be in the range from 3V to V. Each tuning capacitor is an optional component depending on the PCB layout environment. The circuit above is a typical application circuit using an internal LDO. R and C are not necessary if MCU provides reset signal. 2k pull-up resistor for I 2 C communication can be eliminated if other device already uses it for I 2 C communication. LEDs can be directly attached to DIO ports for touch indications of channels. Each DIO port can drive a current of 2mA. 4 Fujitsu Microelectronics America, Inc.

17 FMA2 Top View of 30-pin Package (30SSOP) 30 S0 ID 2 2 S DIO_ 3 2 DIO_4 4 2 DIO_3 2 S4 DIO_2 2 S DIO_ DIO_0 0 FMA2 30S S TINT S GINT 2 S TCLK 3 S VSS 4 S0 S Pin Description 30-Pin SSOP Name IO Pin # Description I Reset, active LOW TCLK I 3 Test Clock Input S I 2, 2 30 Twelve Sensor Inputs from external Touch Pads. I Reference Input. DIO IO 3 Configured by HOST as below: -extended GPIOs, Direct Button Outputs or External Interrupt inputs IO Bidirectional I 2 C Data from/to Host I 0 I2C CLK from Host TINT O Touch Interrupt, it can be generated when touch status is changed. GINT O 2 General Interrupts including touch interrupt, and they can be masked. ID I 2 I2C Chip ID Select(0:0x, :0xB) P 24 Power (2.V~.V) O 23 2.V Regulator Power Output P 22 2.V Power Input VSS P 4 Ground Fujitsu Microelectronics America, Inc.

18 Touch Sensor Controller Typical Application Touch PA D Touch PAD Data Sensor Tuning Cap From MCU 0 K 0uF R C RESET_ N Touch_Sensor_ Touch_Sensor_ 0 Touch_Sensor_ Touch_Sensor_0 Touch_Sensor_ Touch_Sensor_ 2 Touch_Sensor_ 3 Touch_Sensor_ S0 S S 3 S4 S VL DO V2 S S S RE ID DIO_ DIO_ 4 DIO_ 3 DIO_ 2 DIO_ DIO_ 0 SD A SC L TI NT GI NT TC L K VS S VP H S S0 S SET_ N RESET_ N 2K 2K Referenc e Sensor Tuning Cap MCU Connect MCU Connect VCC(3~V) MCU Connect Touch_Sensor_ VCC(3~V ) 0uF Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ Touch_Sensor_0 Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ FMA2 30S Touch_Sensor_4 Touch_Sensor_3 Touch_Sensor_2 Touch_Sensor_ Touch_Sensor_0 Notes: The voltage of Vcc can be in the range from 3V to V. Each tuning capacitor is an optional component depending on the PCB layout environment. The circuit above is a typical application circuit using an internal LDO. R and C are not necessary if MCU provides reset signal. 2k pull-up resistor for I 2 C communication can be eliminated if other device already uses it for I 2 C communication. LEDs can be directly attached to DIO ports for touch indications of channels. Each DIO port can drive a current of 2mA. Fujitsu Microelectronics America, Inc.

19 FMA2 Top View of 24-pin Package (24SSOP) SO 24 S 2 23 ID 3 22 DIO_0 4 2 S4 TINT GINT FMA2 24S S TCLK S VSS 0 S DIO_ 4 S DIO_ 2 3 Pin Description Name IO Pin # Description I 2 Reset, active LOW TCLK I Test Clock Input S I, 4, 24 Nine Sensor Inputs from external Touch Pads. I 3 Reference Input. DIO IO 4,, 2 Configured by HOST as below: -extended GPIOs, Direct Button Outputs or External Interrupt inputs IO Bidirectional I 2 C Data from/to Host I I2C CLK from Host TINT O Touch Interrupt, it can be generated when touch status is changed. GINT O General Interrupts including touch interrupt, and they can be masked. ID I 3 I2C Chip ID Select(0:0x, :0xB) P Power (2.V~.V) O 2.V Regulator Power Output P 2.V Power Input VSS P 0 Ground Fujitsu Microelectronics America, Inc.

20 Touch Sensor Controller Typical Application Data Sensor Tuning Cap Tou ch PA D Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ Touch_Sensor_2 Touch_Sensor_3 Touch_Sensor_4 Touch_Sensor_ VCC (3V~V) Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ X pf Reference Sensor Tuning Cap Touch_Sensor_ Touch_Sensor_ S S4 S Touch_Sensor_4 Touch_Sensor_3 FMA2 24S Touch_Sensor_2 Touch_Sensor_ S S S SO ID DIO_0 TINT GINT TCLK VSS DIO_ DIO_ Touch_Sensor_0 Touch_Sensor_0 VCC (3V~V) 2K 2K Fr om M C U 0 K 0 uf R C MCU Connect MCU Connect MCU Connect Notes: The voltage of VCC can be in the range from 3V to V. The circuit above is a typical application circuit using an internal LDO. R and C are not necessary if MCU provides reset signal. 2k pull-up resistor for I 2 C communication can be eliminated if other device already uses it for I 2 C communication. Fujitsu Microelectronics America, Inc.

21 FMA2 Top View of -pin Package (SSOP) S0 ID 2 S DIO_0 3 TINT GINT 4 FMA2 S 4 TCLK 3 VSS DIO_ 2 S 0 S Pin Description Name IO Pin # Description I Reset, active LOW TCLK I Test Clock Input S I -2, - Six Sensor Inputs from external Touch Pads. I 0 Reference Input. DIO IO 3, Configured by HOST as below: -extended GPIOs, Direct Button Outputs or External Interrupt inputs IO 4 Bidirectional I2C Data from/to Host I I 2 C CLK from Host TINT O Touch Interrupt, it can be generated when touch status is changed. GINT O General Interrupts including touch interrupt, and they can be masked. ID I 2 I 2 C Chip ID Select(0:0x, :0xB) P Power (2.V~.V) O 2.V Regulator Power Output P 4 2.V Power Input VSS P 3 Ground Fujitsu Microelectronics America, Inc.

22 Touch Sensor Controller Typical Application Touch PAD Touch_Sensor_ Touch_Sensor_0 Touch_Sensor_ Touch_Sensor_2 Touch_Sensor_3 VCC(3~V) 0uF Touch_Sensor_ Touch_Sensor_ Touch_Sensor_ Touch PAD Touch_Sensor_3 Touch_Sensor_2 Touch_Sensor_ Touch_Sensor_0 Data Sensor Tuning Cap RE SE T_ N S0 S ID DI O_ 0 SD A VP H SC L VL DO TI NT V2 GI NT VS S TC LK S DI O_ AR EF S RESET_ N 2 3 VCC(3~V ) 2K 2K 4 FMA2 S 0 Xp F Referenc e S enso r Tuning Cap From MCU 0 K 0uF R C RESET_ N MCU Connect MCU Connect MCU Connect Notes: The voltage of Vcc can be in the range from 3V to V. Each tuning capacitor is an optional component depending on the PCB layout environment. The circuit above is a typical application circuit using an internal LDO. R and C are not necessary if MCU provides reset signal. 2k pull-up resistor for I 2 C communication can be eliminated if other device already uses it for I 2 C communication. LEDs can be directly attached to DIO ports for touch indications of channels. Each DIO port can drive a current of 2mA. Fujitsu Microelectronics America, Inc.

23 FMA2 Power Connection There are two methods to supply power to the FMA2 touch sensor controller. One is to receive core voltage from internal LDO and the other is to receive core voltage from an external power supply. In the case of using internal LDO, the LDO should be turned on in Sleep mode and hence it will cause slightly higher power consumption than using an external power supply for core voltage. In Case E, if receives 2.V, internal LDO can not be used because can not output 2.V when receives 2.V from external LDO. Case A. : External V : External 2.V (Internal LDO Off: Register Control) Case B. : External V : Internal LDO 2.V V V 2.V External LDO 0µF External LDO VGG GND VGG GND IO interface to over chip is V IO interface to over chip is V Case C. : External 3.3V : External 2.V (Internal LDO Off: Register Control) Case D. : External 3.3V : Internal LDO 2.V 3.3V 3.3V 2.V External LDO 0µF External LDO VGG GND VGG GND IO interface to over chip is 3.3V IO interface to over chip is 3.3V Case E. : External 2.V : External 2.V VGG 2.V GND External LDO IO interface to over chip is 2.V Fujitsu Microelectronics America, Inc. 2

24 Touch Sensor Controller Tuning System The tuning system helps the developer tune the target touch board with various parameters that determine the performance of the target touch board. The tuning system is positioned between the PC and the target touch board (Figure ). It allows the developer to view all the necessary parameters for tuning and transfers the desired parameters to the FMA2 attached on the target touch board. USB I 2 C PC Tuning System Touch Board Hardware Figure : Conceptual Diagram for Tuning System 4CH I 2 C Communication Port Communication Line On/Off Switch ROM Select Switch Buzzer Power On/Off Switch USB Cable I 2 C Communication Cable FMA2 Touch Board LCD Brightness Control Resistor Buzzer FMA2 Demo Board Figure : Tuning System (USB Interface Board) Using this tuning system, the user can send commands to the MCU or receive touch data from the MCU through the USB interface. The MCU on the USB interface board controls the FMA2 on the target touch board via the I 2 C interface by reading/writing data to access internal registers in the FMA2. 22 Fujitsu Microelectronics America, Inc.

25 FMA2 Software The tuning software installed in the PC will display various parameters that the user can set and monitor. A typical tuning window is shown in Figure. Figure : A Typical Parameter Window of Tuning System Fujitsu Microelectronics America, Inc. 23

26 Touch Sensor Controller Package Dimensions 40QFN Pin # ID.00 G M.00 Top View M Side View Exposed Pad 3.± N- N Pin # ID ±0.0 3.± Terminal Tip 2 0 Detail G 0.3±0.0 Bottom View 0.2±0.0 0.± ~0.0 Seating Plane Units: mm 24 Fujitsu Microelectronics America, Inc.

27 FMA2 32QFN BSC 3. BSC R0. 4x BSC 0.0 ø0.0 Dp 0. Max. R BSC Top View Typ. See Detail A Bottom View Max. Side View 0. Ref Detail A Units: mm Fujitsu Microelectronics America, Inc. 2

28 Touch Sensor Controller 24QFN Pin # ID 4.00 G M 4.00 Top View M Side View Exposed Pad Pin # ID (not soldering) Terminal Tip Detail G Bottom View ~0.0 Seating Plane Units: mm 2 Fujitsu Microelectronics America, Inc.

29 FMA2 30SSOP Top View End View Max. 0.0 Min. 0.0 Typ. Side View Units: mm Fujitsu Microelectronics America, Inc. 2

30 Touch Sensor Controller 24SSOP 24 0 Min. 0.2 BSC. 2 ø Min ø Top View R0. R0. End View R0. 4x Max Typ. Side View Units: mm 2 Fujitsu Microelectronics America, Inc.

31 FMA2 SSOP BSC.00 0 ø ø Top View R0.30 R0.30 End View Max Typ. 0.0 Min. Side View Units: mm Fujitsu Microelectronics America, Inc. 2

32 Revision History Date Revision Updates November, 0 V.0 First Release June 0, 0 V. Copy Updates October 23, 0 V.2 Copy Updates FUJITSU MICROELECTRONICS AMERICA, INC. Corporate Headquarters 20 East Arques Avenue, M/S 333, Sunnyvale, California Tel: (00) -0 Fax: (40) 3- inquiry@fma.fujitsu.com Web Site: 0 Fujitsu Microelectronics America, Inc. All rights reserved. All company and product names are trademarks or registered trademarks of their respective owners. Printed in U.S.A. MCU-DS-232-0/0