Sanyo LC7982A Specifications

Ordering number : EN5946

O1698RM (OT) No. 5946-1/18

Overview

The LC7982A is an LCD dot matrix graphics display controller IC. It stores display data sent from an 8-bit microcontroller in external display RAM and generates dot matrix LCD drive signals. Applications can select either of two modes: graphics mode, in which each bit in external RAM controls the on/off state of an individual pixel (dot) on the LCD, and character mode, in which character codes are stored in external RAM and the dot pattern is generated using the built-in character generator ROM. Thus the LC7982A can support a wide range of applications. The LC7982A is fabricated in a CMOS process, and in conjunction with a CMOS microcontroller, can implement low-power LCD display systems. This device differs from the LC7981 only in the data stored in the built-in character generator ROM.

Features

• LCD dot matrix and graphics display controller

• Display control capacity Graphics mode 512 K dots (216bytes) Character mode 4096 characters (212bytes)

• Character generator ROM 7360 bits

· European character support

Character font: 5 × 7 dots 160 characters Character font: 5 × 11 dots 32 characters (Can be expanded by up to 4 KB using external ROM.)

• Supports interfacing with 8-bit microcontrollers.

• Display duty (program selectable) — From static to 1/256 duty

• Extensive set of command functions — Scroll, cursor on/off/blink, character blinking, bit

manipulation

• Display methods : Method A and method B (program selectable)

• Built-in oscillator circuit (Using an external resistor and capacitor)

• Low power

• +5V single-voltage power supply

Package Dimensions

unit: mm

3055A-QFP60C

LC7982A

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

LCD Dot Matrix Graphics Display Controller

CMOS IC

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.

SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein.

SANYO: QFP60C (QIP60C)

[LC7982A]

192 characters total

Specifications

Absolute Maximum Ratings at Ta = 25°C, GND = 0 V

Allowable Operating Ranges at Ta = –20 to +75°C, GND = 0 V

Electrical Characteristics at Ta = –20 to +75°C, GND = 0 V, VDD= 5 V ±5%

No. 5946-2/18

LC7982A

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage V

max –0.3 to +7.0 V

Input voltage V

–0.3 to VDD+0.3 V

Output voltage V

–0.3 to VDD+0.3 V Allowable power dissipation Pd max Ta = 75°C 200 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +125 °C

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply voltage V

4.75 5.25 V

High-level input voltage V

1 Input and I/O pins other than SYNC and CR. 2.2 V

Low-level input voltage V

1 Input and I/O pins other than SYNC and CR. 0 0.8 V

High-level input voltage V

2 SYNC, CR 0.7 V

Low-level input voltage V

2 SYNC, CR 0 0.3 V

High-level output voltage V

= –0.6 mA, DB0 to DB7, WE,

2.4 V

MA0 to MA15, MD0 to MD7

Low-level output voltage V

= 1.6 mA, DB0 to DB7, WE,

0 0.4 V

MA0 to MA15, MD0 to MD7

High-level output voltage V

= –0.6 mA, SYNC, CPO, FLM,

– 0.4 V

CL1, CL2, D1, D2, MA, MB

Low-level output voltage V

= 0.6 mA, SYNC, CPO, FLM,

0 0.4 V

CL1, CL2, D1, D2, MA, MB [Internal Clock Operation] Clock oscillator frequency f

OSC

Cf = 15 pF ±5%, Rf = 39 kΩ ±2%

500 600 700 kHz [External Clock Operation] Clock operating frequency f

2.5 MHz

Clock duty Duty

47.5 50 52.5 %

Clock rise time trcp

50 ns

Clock fall time tfcp

50 ns

Parameter Symbol Conditions

Ratings

Unit

min typ max

Input leakage current I

VIN= 0 to VDD, CS, E, RS, R/W, RES –5 5 µA

Current drain

1 RC oscillator, f

OSC

= 600 kHz 2 4 mA

2 External clock, fCP= 2.5 MHz 3 5 mA

Pull-up current I

VIN= GND, DB0 to DB7, RD0 to RD7, MD0 to MD7 10 20 µA

(Note 1) (Note 2) (Note 3)

Cf = 15 pF ±5% Rf = 39 kΩ ±2% (When f

OSC

= 600 kHz (typical))

Duty =

× 100%

Th + T1

Open

Oscillator circuit

Timing Characteristics

• Bus read/write operation 1 Read cycle

Write cycle

Ta = –20 to +75°C, VDD= 5V ±5%, GND = 0 V

Note: Test waveform definition

Input pins are driven to 2.4 V and 0.45 V, and the timing is measured at 1.5 V

No. 5946-3/18

LC7982A

DB0 to DB7

Parameter Symbol Conditions

Ratings

Unit

min typ max

Address setup time t

90 ns

Address hold time t

10 ns

Data delay time (read) t

DDR

CL= 50 pF 140 ns

Data hold time (read) t

DHR

10 ns

Data setup time (write) t

DSW

220 ns

Data hold time (write) t

DHW

20 ns

Measurement point

• Bus read/write operation 2 Data read cycle

Data write cycle

Ta = –20 to +75°C, VDD= 5V ±5%, GND = 0 V

Notes: • For character display, HP is the number of dots in the horizontal direction per character,

and for graphics mode, HP is the number of bits shown on the display from each byte of display data.

• f

OSC

is the oscillator frequency, in units of MHz.

• All measurements are made at 1.5 V.

• Parallel operation (master mode)

Ta = –20 to +75°C, VDD= 5V ±5%, GND = 0 V

Notes: • With no loads on any of the output pins.

• Measurements are made at 0.5 V

No. 5946-4/18

LC7982A

Parameter Symbol Instruction register value

Ratings

Unit

min typ max

Read cycle time t

RCY

0DH ns

Write cycle time t

WCY

1 0EH, 0FH ns

Write cycle time t

WCY

2 0CH ns

Write cycle time t

WCY

00H, 01H, 02H, 03H, 04H,

08H, 09H, 0AH, 0BH

(HP+2) × 10

+200

OSC

(2HP+2) × 10

+200

OSC

(HP+2) × 10

+200

OSC

2000

+200

OSC

Parameter Symbol Conditions

Ratings

Unit

min typ max

SYNC delay time t

DSY

100 ns

SYNC pulse width t

WSY

350 ns

• External RAM and ROM interface

Read Cycle at Ta = –20 to +75°C, VDD= 5 V ±5%, GND = 0 V

Write Cycle at Ta = –20 to +75°C, VDD= 5 V ±5%, GND = 0 V

Notes: • With no loads on any of the output pins.

• All measurements are made at 1.5 V.

• Driver IC interface

Ta = –20 to +75°C, VDD= 5 V ±5%, GND = 0 V

Notes: • With no loads on any of the output pins.

• Measurements other than those with a specified measurement point are made at 0.5 V

No. 5946-5/18

LC7982A

Parameter Symbol Conditions

Ratings

Unit

min typ max

MA0 to MA15 read address delay time

DMAR

95 ns

MD0 to MD7, RD0 to RD7 setup time

SMDR

105 ns

Parameter Symbol Conditions

Ratings

Unit

min typ max

Memory address setup time t

SMAW

50 ns

WE pulse width t

WWE

350 ns

Memory data setup time t

SMDW

250 ns

Memory address hold time t

HMAW

50 ns

Memory data hold time t

HMDW

50 ns

Parameter Symbol Conditions

Ratings

Unit

min typ max

Clock cycle time t

CYC

400 ns

Clock phase difference t

DCL

100 ns

Clock rise and fall times t

CRF

30 ns

D1 and D2 phase difference t

100 ns

MA and MB phase difference t

DMA

200 ns

FLM phase difference t

DFM

200 ns

MA0 to MA15

MD0 to MD7

RD0 to RD7

D1, D2

Pin Assignment

Block Diagram

• When expansion ROM is used, MA0 to MA11 are used as the RAM address and MA12 to MA15 are used as the expansion ROM address.

No. 5946-6/18

LC7982A

Input and output interface circuit

Multiplexer

Busy

flag

Data input

Data

output

Instruction

Oscillator

circuit

Mode

control

Dot counter

Refresh address

counter (1)

Refresh address

counter (2)

Cursor address

counter

Line address

counter

Cursor signal

generator

Character

generator

ROM

Expansion

ROM

MD0 to MD7

RD0 to RD7

DB0 to DB7

Multiplexer

Parallel to series

converter

Parallel to series

converter

Dot register

Control signal

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