Built-in LCD display RAM Built-in RC oscillator

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1 PAT No. : TW RAM Mapping 488 LCD Controller for I/O MCU Technical Document Application Note Features Operating voltage: 2.7V~5.2V Built-in LCD display RAM Built-in RC oscillator R/W address auto increment External kHz crystal or 32kHz frequency source input 1/4 bias, 1/8 duty, frame frequency is 64Hz Max. 488 patterns, 8 commons, 48 segments Built-in internal resistor type bias generator 3-wire serial interface 8 kinds of time base or WDT selection Time base or WDT overflow output Two selection buzzer frequencies (2kHz or 4kHz) Power down command reduces power consumption Software configuration feature Data mode and Command mode instructions Three data accessing modes VLCD pin to adjust LCD operating voltage 100-pin LQFP package General Description is a peripheral device specially designed for I/O type MCU used to expand the display capability. The max. display segment of the device are 384 patterns (488). It also supports serial interface, buzzer sound, watchdog timer or time base timer functions. The is a memory mapping and multi-function LCD controller. The software configuration feature of the make it suitable for multiple LCD applications including LCD modules and display subsystems. Only three lines are required for the interface between the host controller and the. The HT162X series have many kinds of products that match various applications. Selection Table HT162X HT1620 HT1621 HT1622 HT16220 HT1625 HT1626 COM SEG Built-in Osc. Crystal Osc. Rev November 25, 2014

2 Block Diagram 5 +, E I F = O 4 ) J H 6 E E C + E H? K E J +,, H E L A H * E = I + E H? K E J + + % % 8 +, * * 6 A. H A G K A? O 9 = J? C 6 E A H / A A H = J H E A * = I A / A A H = J H Pin Assignment , * * 6 6 6! !!!!!! $! %! &! '! $ % + ' ' '& '% ' $ ' ' '! ' ' & &' & &% & $ & &! & & & % '% & % % % $ % + % + %!! %! % ' % & $ ' % $ & $ $ % $ $ $! $ 0 6 $! $! 3. 2 ) $ $ ' $ & ' % & $ % $! +!! + + $ % & '!!!!!!!! $! %! &! '! + $ % & '! $ % & '! $ % & ' ' & % $! + % + $ + + +! Rev November 25, 2014

3 Pad Assignment!!!!!! $! %! &! '! $ % % % $ ' $ & $ % $ $ $ $ $! $ $ $ ' & % $!!!! ' & % $ $ , % & ' ' & % $!! ' & * % $ *! '! & 6! 6 6!! %! + $ + % + & '! $ % & '!!!!!!!! $ ' & % $! + % + $ + + +! Chip size: (mil) 2 * The IC substrate should be connected to VDD in the PCB layout artwork. Rev November 25, 2014

4 Pad Coordinates Unit: m Pad No. X Y Pad No. X Y Rev November 25, 2014

5 Pad Description Pad No. Pad Name I/O Description 1 CS I 2 RD I Chip selection input with pull-high resistor. When the CS is logic high, the data and command read from or written to the are disabled. The serial interface circuit is also reset But if the CS is at logic low level and is input to the CS pad, the data and command transmission between the host controller and the are all enabled. READ clock input with pull-high resistor. Data in the RAM of the are clocked out on the falling edge of the RD signal. The clocked out data will appear on the data line. The host controller can use the next rising edge to latch the clocked out data. 3 WR I WRITE clock input with pull-high resistor. Data on the DATA line are latched into the on the rising edge of the WR signal. 4 DATA I/O Serial data input or output with pull-high resistor 5 VSS Negative power supply, ground 6 7 OSCI OSCO I O The OSCI and OSCO pads are connected to a kHz crystal in order to generate a system clock. If the system clock comes from an external clock source, the external clock source should be connected to the OSCI pad. But if an on-chip RC oscillator is selected instead, the OSCI and OSCO pads can be left open. 8 VDD Positive power supply 9 VLCD I LCD operating voltage input pad. 10 IRQ O Time base or watchdog timer overflow flag, NMOS open drain output 11, 12 BZ, BZ O 2kHz or 4kHz tone frequency output pair 13~15 T1~T3 I Not connected 16~23 COM0~COM7 O LCD common outputs 24~71 SEG0~SEG47 O LCD segment outputs Absolute Maximum Ratings Supply Voltage...0.3V to 5.5V Input Voltage...V SS 0.3V to V DD +0.3V Storage Temperature...50C to125c Operating Temperature...25C to75c Note: These are stress ratings only. Stresses exceeding the range specified under Absolute Maximum Ratings may cause substantial damage to the device. Functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. Rev November 25, 2014

6 D.C. Characteristics Ta=25C Symbol Parameter V DD Test Conditions Conditions Min. Typ. Max. Unit V DD Operating Voltage V I DD1 I DD2 I DD11 I DD22 I STB V IL V IH I OL1 I OH1 I OL2 I OH2 I OL3 I OH3 I OL4 I OH4 R PH Operating Current Operating Current Operating Current Operating Current Standby Current Input Low Voltage Input High Voltage BZ, BZ, IRQ BZ, BZ DATA DATA LCD Common Sink Current LCD Common Source Current LCD Segment Sink Current LCD Segment Source Current Pull-high Resistor 3V No load or LCD ON A 5V On-chip RC oscillator A 3V No load or LCD ON A 5V Crystal oscillator A 3V No load or LCD OFF 8 30 A 5V On-chip RC oscillator A 3V No load or LCD OFF 20 A 5V Crystal oscillator 35 A 3V 1 10 A No load, Power down mode 5V 2 20 A 3V V DATA, WR, CS, RD 5V V 3V V DATA, WR, CS, RD 5V V 3V V OL =0.3V ma 5V V OL =0.5V ma 3V V OH =2.7V ma 5V V OH =4.5V ma 3V V OL =0.3V ma 5V V OL =0.5V ma 3V V OH =2.7V ma 5V V OH =4.5V ma 3V V OL =0.3V A 5V V OL =0.5V A 3V V OH =2.7V A 5V V OH =4.5V A 3V V OL =0.3V A 5V V OL =0.5V A 3V V OH =2.7V A 5V V OH =4.5V A 3V DATA, WR, CS, RD k 5V k Rev November 25, 2014

7 A.C. Characteristics Ta=25C Test Conditions Symbol Parameter V DD Conditions Min. Typ. Max. Unit f SYS1 System Clock 5V On-chip RC oscillator khz f SYS2 System Clock External clock source 32 khz f LCD1 LCD Frame Frequency 5V On-chip RC oscillator Hz f LCD2 LCD Frame Frequency External clock source 64 Hz t COM LCD Common Period n: Number of COM n/f LCD sec f CLK1 Serial Data Clock (WR Pin) 3V khz Duty cycle 50% 5V khz f CLK2 t CS Serial Data Clock (RD Pin) Serial Interface Reset Pulse Width (Figure 3) t CLK WR, RDInput Pulse Width (Figure 1) t r,t f t su t h t su1 t h1 f TONE Rise/Fall Time Serial Data Clock Width (Figure 1) Setup Time DATA to WR, RDClock Width (Figure 2) Hold Time DATA to WR,RDClock Width (Figure 2) Setup Time for CS to WR, RDClock Width (Figure 3) Hold Time for CS to WR,RDClock Width (Figure 3) 3V 75 khz Duty cycle 50% 5V 150 khz CS ns 3V 5V Write mode Read mode 6.67 Write mode Read mode ns ns ns ns ns Tone Frequency (2kHz) khz 5V On-chip RC oscillator Tone Frequency (4kHz) khz t OFF V DD OFF Times (Figure 4) VDD drop down to 0V 20 ms t SR V DD Rising Slew Rate (Figure 4) 0.05 V/ms t RSTD Delay Time after Reset (Figure 4) 1 ms s s Note: 1. If the conditions of Power-on Reset timing are not satisfied in power On/Off sequence, the internal Power-on Reset (POR) circuit will not operate normally. 2. If the VDD drops below the minimum voltage of operating voltage spec. during operating, the conditions of Power-on Reset timing must be satisfied also. That is, the VDD must drop to 0V and keep at 0V for 20ms (min.) before rising to the normal operating voltage. Rev November 25, 2014

8 +? JB JH ' /, J+ J+, * +? 8 ) 1, JI K JD /, /, Figure 1 Figure 2 +? J JI K JD. E H I J +? = I J +? /, /, 8 J.. J5 4 ' 8,, J4 5 6, Figure 3 Figure 4. Power-on Reset Timing Functional Description Display Memory RAM Structure The static display RAM is organized into 964 bits and stores the display data. The contents of the RAM are directly mapped to the contents of the LCD driver. Data in the RAM can be accessed by theread, WRITE and READ-MODIFY-WRITE commands. The following is a mapping from the RAM to the LCD patterns. Time Base and Watchdog Timer WDT The time base generator and WDT share the same divided (/256) counter. TIMER DIS/EN/CLR, WDT DIS/EN/CLR and IRQ EN/DIS are independent from each other. Once the WDT time-out occurs, the IRQ pin will remain at logic low level until the CLR WDT or the IRQ DIS command is issued. If an external clock is selected as the source of system frequency, the SYS DIS command turns out invalid and the power down mode fails to be carried out until the external clock source is removed. Buzzer Tone Output A simple tone generator is implemented in the. The tone generator can output a pair of differential driving signals on the BZ and BZ which are used to generate a single tone. Command Format The can be configured by the software setting. There are two mode commands to configure the resource and to transfer the LCD display data. + % + $ + + +! + + +!! % H A I I % * E ) $ ) % ' ',!,,,, = J H,!,,,, = J H, = J = * E J I,!,,, RAM Mapping Rev November 25, 2014

9 +? 5 K H? A 6 E A * = I A $ , 1 5 9, 6 -, E A H 9, 6, , , 6 Timer and WDT Configurations The following are the data mode ID and the command mode ID: Operation Mode ID READ Data WRITE Data READ-MODIFY-WRITE Data COMMAND Command If successive commands have been issued, the command mode ID can be omitted. While the system is operating in the non-successive command or the non-successive address data mode, the CS pin should be set to 1 and the previous operation mode will be reset also. The CS pin returns to 0, a new operation mode ID should be issued first. Name Command Code Function TONE OFF X Turn-off tone output TONE 4K 010X-XXXX-X Turn-on tone output, tone frequency is 4kHz TONE 2K 0110-XXXX-X Turn-on tone output, tone frequency is 2kHz Rev November 25, 2014

10 Timing Diagrams READ Mode (Command Code :1 1 0) ) $ ) ) )! ) ) ),,,,! ) $ ) ) )! ) ) ),,,,! A H H A I I ), = J = ) A H H A I I ), = J = ) READ Mode (Successive Address Reading) ) $ ) ) )! ) ) ),,,,!,,,,!,,,,!,,,,!, A H H A I I ), = J =, = J ) = ), = J = ), = J = ) WRITE Mode (Command Code :1 0 1) ) $ ) ) )! ) ) ),,,,! ) $ ) ) )! ) ) ),,,,! A H H A I I ), = J = ) A H H A I I ), = J = WRITE Mode (Successive Address Writing) ) $ ) ) )! ) ) ),,,,!,,,,!,,,,!,,,,!, A H H A I I ), = J = ), = J = ), = J = ), = J = ) Rev November 25, 2014

11 READ-MODIFY-WRITE Mode (Command Code :1 0 1) ) $ ) ) )! ) ) ),,,,!,,,,! A H H A I I ), = J, = = J = ) ) ) $ ) ) )! ) ) ),,,,! A H H A I I ), = J = READ-MODIFY-WRITE Mode (Successive Address Accessing) ) $ ) ) )! ) ) ),,,,!,,,,!,,,,!,,,,!,,,,!, A H H A I I ), = J = ), = J = ), = J = ), = J =, = J ) = ) Command Mode (Command Code :1 0 0) + & + % + $ + + +! & + % + $ + + +! E + H, = J A Mode (Data and Command Mode) + H A I I = J =, = J A + H A I I = J =, = J A + H A I I = J A Rev November 25, 2014

12 Application Circuits , + 7 +? K J $! * * + + % % 2 E A - N J A H = +?! 0 - N J A H = +?! 0? D E F 5 + * E = I &, K J O +, 2 = A + H O I J =! % $ & 0 Note: The connection of IRQ and RD pin can be selected depending on the requirement of the MCU. The voltage applied to V LCD pin must be equal to or lower than V DD. Adjust VR to fit user's LCD panel display voltage (V LCD ). Adjust R (external pull-high resistance) to fit users time base clock. Command Summary Name ID Command Code D/C Function Def. READ 110 A6A5A4A3A2A1A0D0D1D2D3 D Read data from the RAM WRITE 101 A6A5A4A3A2A1A0D0D1D2D3 D Write data to the RAM READ-MODIFY- WRITE 101 A6A5A4A3A2A1A0D0D1D2D3 D Read and Write data to the RAM SYS DIS X C Turn off both system oscillator and LCD bias generator SYS EN X C Turn on system oscillator LCD OFF X C Turn off LCD display Yes LCD ON X C Turn on LCD display TIMER DIS X C Disable time base output Yes WDT DIS X C Disable WDT time-out flag output Yes TIMER EN X C Enable time base output WDT EN X C Enable WDT time-out flag output TONE OFF X C Turn off tone outputs Yes CLR TIMER X C Clear the contents of the time base generator CLR WDT X C Clear the contents of the WDT stage RC 32K XX-X C System clock source, on-chip RC oscillator Yes EXT (XTAL) 32K XX-X C System clock source, external 32kHz clock source or crystal oscillator kHz TONE 4K X-XXXX-X C Tone frequency output: 4kHz Yes Rev November 25, 2014

13 Name ID Command Code D/C Function Def. TONE 2K XXXX-X C Tone frequency output: 2kHz IRQ DIS X-0XXX-X C Disable IRQ output Yes IRQ EN X-1XXX-X C Enable IRQ output F X-0000-X C F X-0001-X C F X-0010-X C F X-0011-X C F X-0100-X C F X-0101-X C F X-0110-X C F X-0111-X C Time base clock output: 1Hz The WDT time-out flag after: 4s Time base clock output: 2Hz The WDT time-out flag after: 2s Time base clock output: 4Hz The WDT time-out flag after: 1s Time base clock output: 8Hz The WDT time-out flag after: 1/2s Time base clock output: 16Hz The WDT time-out flag after: 1/4s Time base clock output: 32Hz The WDT time-out flag after: 1/8s Time base clock output: 64Hz The WDT time-out flag after: 1/16s Time base clock output: 128Hz The WDT time-out flag after: 1/32s Yes TEST X C Test mode, user dont use. NORMAL X C Normal mode Yes Note: X : Dont care A6~A0 : RAM address D3~D0 : RAM data D/C : Data/Command mode Def. : Power on reset default All the bold forms, namely 110, 101, and 100, are mode commands. Of these, 100indicates the command mode ID. If successive commands have been issued, the command mode ID except for the first command will be omitted. The source of the tone frequency and of the time base or WDT clock frequency can be derived from an on-chip 32kHz RC oscillator, a kHz crystal oscillator, or an external 32kHz clock. Calculation of the frequency is based on the system frequency sources as stated above. It is recommended that the host controller should initialize the after power on reset, for power on reset may fail, which in turn leads to the malfunctioning of the. Rev November 25, 2014

14 Package Information Note that the package information provided here is for consultation purposes only. As this information may be updated at regular intervals users are reminded to consult the Holtek website for the latest version of the package information. Additional supplementary information with regard to packaging is listed below. Click on the relevant section to be transferred to the relevant website page. Further Package Information (include Outline Dimensions, Product Tape and Reel Specifications) Packing Meterials Information Carton information Rev November 25, 2014

15 100-pin LQFP (14mm14mm) Outline Dimensions % +, 0 / % $ 1. ) * - $ = Symbol Dimensions in inch Min. Nom. Max. A BSC B BSC C BSC D BSC E BSC F G H I J K Symbol Dimensions in mm Min. Nom. Max. A 16 BSC B 14 BSC C 16 BSC D 14 BSC E 0.50 BSC F G H 1.60 I J K Rev November 25, 2014

16 Copyright 2014 by HOLTEK SEMICONDUCTOR INC. The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holteks products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at Rev November 25, 2014

PATENTED. PAT No. : HT1622/HT1622G RAM Mapping 32 8 LCD Controller for I/O MCU. Features. General Description.

PATENTED. PAT No. : HT1622/HT1622G RAM Mapping 32 8 LCD Controller for I/O MCU. Features. General Description. RAM Mapping 328 LCD Controller for I/O MCU PATENTED PAT No. : 099352 Features Operating voltage: 2.7V~5.2V Built-in RC oscillator 1/4 bias, 1/8 duty, frame frequency is 64Hz Max. 328 patterns, 8 commons,