NT3881D. Dot Matrix LCD Controller and Driver. Features. General Description 1 V2.2. March,2000

Transcription

1 NT88 ot atrix L ontroller and river Features Internal L drivers 6 common signal drivers 0 segment signal drivers (can be externally extended to 00 segments using NT88) aximum display dimensions 0 characters * lines or 80 characters * line Interfaces with -bit or 8-bit PU Versatile display functions provided on chip: isplay lear, ursor Home, isplay N/FF, ursor N/FF, haracter Blinking, ursor hift, and isplay hift Three duty factors, selected by PRRA: /8, /, and /6 isplays ata RA ( RA): 80 X 8 bits (displays up to 80 characters) haracter enerator RA ( RA): 6 X 8 bits for general data, 8 X 8 programmable dot patterns, or X 0 programmable dot patterns Low voltage reset NVATK Identification code Bonding option for A-type and B-type waveform haracter enerator R ( R): kinds of R sizes: 9 characters: 60 X 8 dot patterns X 0 dot patterns 0 characters: 9 X 8 dot patterns 8 X 0 dot patterns 6 characters: 9 X 8 dot patterns 6 X 0 dot patterns ustom R is also available Built-in power-on reset function Logic power supply: single +V supply L driver power supply: V - V (V+0. - V-.) Three oscillator operations (Freq. = 0KHz - 70KHz): Internal oscillation eramic resonator xternal clock Process Available in 80-pin QFP or in HIP FR eneral escription The NT88 is a dot matrix L controller and driver LI that can operate with either a -bit or an 8-bit microprocessor (PU). NT88 receives control character codes from the PU, stores them in an internal RA (up to 80 characters), transforms each character code into a X 7, X 8, or X 0 dot matrix character pattern, and then displays the codes on the L panel. The built-in haracter enerator R consists of 6 different character patterns. The NT88 also contains haracter enerator RA where the user can store 8 different character patterns at run time. These memory features make character display flexible. NT88 also provides many display instructions to achieve versatile L display functions. The NT88 is fabricated on a single LI chip using the process, resulting in very low power requirements. With several NT88 driver Is connected to the NT88, up to 80 characters can be displayed. arch,000 V.

2 NT88 Pin onfiguration U88F NT88F N B B0 R/W R V L L V V V V V B 7 B 6 B B B B

3 NT88 Pad onfiguration NT88H B7 0 B6 N V B B B B B V V V V V L L V A R R /W B0 B

4 NT88 Block iagram

5 NT88 Pin and Pad escriptions Pin and Pad No. esignation I/ xternal onnection escription - - L panel egment signal output pins,, Pins connected to resistor or ceramic filter for internal clock oscillation. For external clock operation, clock inputs to. 6-0 V - V P Power supply Power supply for L driver L NT88 lock to latch serial data sent to NT88. L NT88 lock to shift serial data, 8 VA, VB P Power supply V: +V A-Type waveform: V bond to VA B-Type waveform: V bond to VB N P Power supply N: 0V NT88 witch signal to convert L drive waveform to A NT88 haracter pattern data corresponding to each common signal is transmitted serially from this output. 0-Non selection, -selection. 6 R I PU Register select signal 0: Instruction register (write) Busy flag, address counter (read) : ata register (write, read) 7 R/W I PU Read/Write control signal 0: Write : Read 8 I PU Read/Write start signal 9 - B0 - B I/ PU Lower tri-state bi-directional data bus for transmitting data between PU and NT88. Not used during -bit operation. - 6 B - B7 I/ PU Higher tri-state bi-directional data bus for transmitting data between PU and NT88. B7 is also used as busy flag L panel ommon signal output pins L panel egment signal output pins

6 NT88 Functional escription The NT88 is a dot-matrix L controller and driver LI. It operates with either a -bit or an 8-bit microprocessor (PU). The NT88 receives both instructions and data from the PU. ome instructions set operation modes, such as the function mode, data entry mode, and display mode; as well as some control L display functions, such as clear display, restore display, shift display, and cursor. ther instructions include read and write both data and addresses. All instructions allow users convenient and powerful functions to control the L dot-matrix displays. ata is written into and read from the ata isplay RA ( RA) or the haracter enerator RA ( RA). As display character codes, the data stored in the RA decodes a set of dot-matrix character patterns that are built into the haracter enerator R ( R). The R, with many character patterns (up to 6 patterns), defines the character pattern fonts. The NT88 regularly scans the character patterns through the segment drivers. The RA stores character pattern fonts at run time if users intend to show character patterns that are not defined in the R. This feature makes character display flexible. ther unused bytes can be used as general-purpose data storage. The L driver circuit consists of 6 common signal drivers and 0 segment signal drivers allowing a variety of application configurations to be implemented. Additionally, the user can extend display size by cascading the segment driver LI NT88. The maximum display dimensions can be either 80 characters in a -line display or 0 characters in a -line display. haracter enerator R ( R) The character generator R generates L dot character patterns from the 8-bit character pattern codes. The NT88 provides R configurations:. 9 haracters: The R contains 60 X 8 dot character patterns and X 0 dot character patterns. An example is the NT88-0, in which the relation between the character codes and character patterns is shown in Table. The character codes from 00H to 0FH are used to get character patterns from the RA. haracter codes from 0H to FH and from 80H to 9FH map to full character patterns. haracter codes from 0H to FFH are assigned to generate X 0 dot character patterns, and other codes are used to generate x8 dot character patterns.. 0 haracters: The R contains 9 X 8 dot character patterns and 8 X 0 dot character patterns. An example of this type is the NT88-0, in which the relation between the character codes and character patterns is shown in Table. The character codes from 00H to 0FH are used to get character patterns from the RA. haracter codes from 0H to FH and from 0H to FFH are assigned to generate X 0 dot character patterns, and other codes to generate X 8 dot character patterns. No null character pattern exists in this type. Note that the underlined cursor, displayed on the 8th duty may be obscure if the 8th row of a dot character pattern is coded. We recommend that users display the cursor in the blinking mode if they code x8 dot character patterns is their custom R.. 6 haracters: The R contains 9 X 8 dot character patterns and 6 X 0 dot character patterns. No adequate example is presented here. The only difference between this type and the just mentioned second type is that the character codes from 00H to 0FH get character patterns from the R rather than from the RA. These character codes are assigned to generate X 0 dot character patterns. In this application, the RA would be employed as a general-purpose data storage. ustom character patterns are available by maskprogramming R. For convenience of character pattern development, NVATK has developed a userfriendly editor program for the NT88 to help determine the character patterns users prefer. By executing the program on the computer, users can easily create and modify their character patterns. By transferring the resulting files generated by the program through a modem or some other communication method, the user and NVATK have established a reliable, fast link for programming the R. 6

7 NT88 Absolute aximum Ratings* Power upply Voltage (V) V to +0.7V Power upply Voltage(V to V). V -.V to V+0.V Input Voltage (VI) V to V +0.V perating Temperature (TPR) to +60 torage Temperature (TT) to + All voltage values are referenced to N = 0V V to V, must maintain V V V V V V. *omments tresses above those listed under "Absolute aximum Ratings" may cause permanent damage to this device. These are stress ratings only. Functional operation of this device at these or any other conditions above those indicated in the operational sections of this specification is not implied or intended. xposure to the absolute maximum rating conditions for extended periods may affect device reliability. lectrical haracteristics (V =.0V, N = V = 0V, TA = ) ymbol Parameter in. Typ. ax. Unit onditions Applicable Pin VIH "H" Level Input Voltage (). - V V VIL "L" Level Input Voltage () V VIH "H" Level Input Voltage () V V V B0 - B7, R, R/W, VIL "L" Level Input Voltage () N -.0 V VH "H" Level utput Voltage (). - - V IH = -0.mA VL "L" Level utput Voltage () V IL =.ma VH "H" Level utput Voltage () 0.9 V - - V IH = -0.0mA VL "L" Level utput Voltage () V V IL = 0.0mA B0 - B7 (TTL) L, L,, () V river Voltage escending () V I = 0.0mA - 6 V river Voltage escending () V I = 0.0mA - 0 IIL Input Leakage urrent - - µa VIN = 0 to V -IP Pull-up urrent 0 0 µa V = V R, R/W, B0-B7 IP upply urrent Power upply urrent ma Rf oscillation, from external clock V = V, f = fp = 70KHz V 7

8 NT88 lectrical haracter (continued) ymbol Parameter in. Typ. ax. Unit onditions Applicable Pin xternal lock peration fp xternal lock perating Frequency 70 0 KHz tuty xternal lock uty ycle 0 % trp xternal lock Rise Time µs tfp xternal lock Fall Time µs Internal lock peration (R scillator) f scillator Frequency KHz Rf = 9KΩ ± % Internal lock peration (eramic Resonator scillator) f scillator Frequency 0 KHz eramic resonator VL VL L riving Voltage V V V - V / bias /bias A haracteristics Read ycle (V =.0V, N = V = 0V, TA = ) ymbol Parameter in. Typ. ax. Unit onditions ty nable ycle Time ns Figure twh nable "H" Level Pulse Width ns Figure tr, tf nable Rise/Fall Time - - ns Figure 60 ta R, R/W etup Time ns Figure tah R, R/W Address Hold Time ns Figure tr Read ata utput elay ns Figure thr Read ata Hold Time ns Figure 8

9 NT88 A haracteristics (continued) Write ycle (V =.0V, N = V = 0V, TA = ) ymbol Parameter in. Typ. ax. Unit onditions ty nable ycle Time ns Figure twh nable "H" Level Pulse Width ns Figure tr, tf nable Rise/Fall Time - - ns Figure 60 ta R, R/W etup Time ns Figure tah R, R/W Address Hold Time ns Figure t ata utput elay ns Figure thr ata Hold Time ns Figure Notes: : 8-bit operation mode : -bit operation mode Timing haracteristics of Interface ignals with egment river LI NT88 (V = V, N = V = 0V, TA = ) ymbol Parameter in. Typ. ax. Unit onditions twh lock Pulse Width High ns Figure twl lock Pulse Width Low ns Figure tu ata etup Time ns Figure th ata Hold Time ns Figure tu lock etup Time ns Figure t elay Time ns Figure Power upply onditions Using Internal Reset ircuit ymbol Parameter in. Typ. ax. Unit onditions trn Power upply Rise Time ns Figure tff Power upply FF Time - - ms Figure 9

10 NT88 Timing Waveforms Read peration Figure.Bus Read peration equence (Reading out data from NT88 to PU) Write peration Interface ignals with egment river LI Figure. Bus Write peration equence (Writing data from PU to NT88) Figure. ending ata to egment river LI NT88 0

11 NT88 Interface ignals with egment river LI (continued) Figure. t FF stipulates the time of power FF for instantaneous power supply to or when power supply repeats N and FF. Note : The NT88 has three clock options: A. Internal scillator peration (With eramic Filter) Rf : Ω ± 0% Rd :.KΩ ± % = : 680pF ± 0% B. Internal scillator (With Rf Resistor) nly Rf may be connected between and. The wire connection Rf must be as short as possible.. xternal lock peration and. Note : Input/utput Terminals: A. Input Terminal Applicable Terminal : (No Pull Up )

12 NT88 Applicable Terminals: R, R/W (with Pull Up ) B. utput Terminal Applicable Terminals: L, L,,. I/ Terminal Applicable Terminals: B0 to B7

13 NT88 Table. orrespondence between haracter odes and haracter Patterns (NVATK tandard NT88-0)

14 NT88 Table. orrespondence between haracter odes and haracter Patterns (NVATK tandard NT88-0)

15 NT88 Instruction et Instruction ode Function R RW B7 B6 B B B B B B0 isplay lear isplay/ ursor Home * ntry ode et I/ isplay N/FF isplay/ ursor hift B lear entire display area, restore display from shift, and load address counter with RA address 00H. Restore display from shift and load address counter with RA address 00H. pecify direction of cursor movement and display shift mode. This operation takes place after each data transfer (read/write). pecify activation of display () cursor () and blinking of character at cursor position (B). xecution time (max) (f = 0KHz).6ms.6ms / R/L * * hift display or move cursor. 0µs Function et L N F * * RA Address et RA Address et Busy Flag/ Address ounter Read RA/ RA ata Write RA/ RA ata Read A 0 0 A 0 BF A 0 Write data Read data I/ = : Increment I/ = 0 : ecrement = : isplay hift n = : isplay n = : ursor isplay n B = : ursor Blink n / = : hift isplay / = 0 : ove ursor R/L = : hift Right R/L = 0 : hift Left L = : 8-Bit L = 0 : -Bit N = : ual Line N = 0 : ignal Line F = : x0 dots F = 0 : x8 dots BF = : Internal peration BF = : Ready for Instruction Note : ymbol "*" signifies an insignificant bit (disregard). Note : orrect input value for "N" is predetermined for each model. et interface data length (L), number of display line (N), and character font (F). Load the address counter with a RA address. ubsequent data access is for RA data. Load the address counter with a RA address. ubsequent data access is for RA data. Read Busy Flag (BF) and contents of Address ounter (A). Write data to RA or RA. Read data from RA or RA. RA : isplay ata RA RA : haracter enerator RA A : haracter enerator RA Address A : isplay ata RA Address A : Address ounter 0µs 0µs 0µs 0µs 0µs 0µs 0µs 0µs

16 NT88 Interface to L () haracter Font and Number of Lines The NT88 provides a X 7 dot character font -line mode, a X 0 dot character font -line mode and a X 7 dot character font -line mode, as shown in the table below. Three types of common signals are available as displayed in the table. The number of lines and the font type can be selected by the program. Number of Lines haracter Font Number of ommon ignals uty Factor X 7 dots + ursor (or x8 dots) 8 /8 X 0 dots + ursor / X 7 dots + ursor (or x8 dots) 6 /6 () onnection to L The following L connection examples show the various combinations between characters and lines. NT88 can directly drive the following combinations: (a) X 8 Font - 8 character X line (/8 duty cycle, / bias) L PANL 8 NT88 0 6

17 NT88 (b) X 0 Font - 8 character X line (/ duty cycle, / bias) L PANL 8 NT (c) X 8 Font - 8 character X lines (/6 duty cycle, / bias) L PANL 8 NT

18 NT88 (d) X 8 Font - 6 character X line (/6 duty cycle, / bias) L PANL 8 NT

19 NT88 () Bias Power onnection NT88 provides / or / bias for various duty cycle applications. The power division voltage is described in the following table. The connection of NT88, power supply, and resistors are also shown as follows: Power ivision /8, / uty ycle - / Bias /6 uty ycle - / Bias V V - / VL V - / VL V V - / VL V - / VL V V - / VL V - / VL V V - / VL V - / VL V V - VL V - VL V V V V V R V R R R V V NT88 V R V L NT88 V R R V L V R V R V V VR V VR V Note: The resistance value depends on the L panel size. 9

20 NT88 () L Waveform A-type, /8 uty ycle, / Bias A-type, / uty ycle, / Bias A-type, /6 uty ycle, / Bias 0

21 NT88 Application ircuit (for reference only) L PANL L L L V N NT88 R L L L R L F L V L N NT88 R L R F L L V V V V V V 6 V V V V V V 6 L NT88 L V N V V V V V R R R R R VR N or other negative voltage

22 NT88 Bonding iagram NT88H Y (0, 0) X ÆËÉÄ µ ÆÄÊÈ µ * ubstrate onnect to V or keep floating * Pad window area: 0µm X 0µm

23 NT88 Bonding imensions Unit: µm Pad. No. esignation X Y N V V V V V L L VA R R/W B B Pad. No. esignation X Y B B 69-7 B B 69-7 B B VB 76-86

24 NT88 rdering Information Part No. Package Remarks NT88H-0 HIP FR Refer to Table NT88F/A-0 80L QFP/A-type waveform Refer to Table NT88F/B-0 80L QFP/B-type waveform Refer to Table NT88H-0 HIP FR Refer to Table NT88F/A-0 80L QFP/A-type waveform Refer to Table NT88F/B-0 80L QFP/B-type waveform Refer to Table

25 NT88 Package Information QFP 80L utline imensions unit: inches/mm 80 H 6 6 H e b 0 ~ c ee etail F eating Plane y A A A L L etail F ymbol imensions in inches imensions in mm A 0.0 ax..0 ax. A 0.00 in. 0.0 in. A 0.±0.00.8±0. b c ± ± ± ±0. e 0.0± ± N N N..60 N. H 0.70± ±0. H 0.976±0.0.79±0. L 0.07± ±0.0 L 0.09±0.008.±0.0 y ax. 0. ax. θ 0 ~ 0 ~ Notes:. imensions & do not include resin fins.. imensions & are for P Board surface mount pad pitch design reference only