ST7093 Ver la hoja de datos (PDF) - Sitronix Technology Co., Ltd.

Número de pieza

componentes Descripción

Fabricante

ST7093

26 COM / 80 SEG LCD CONTROLLER/DRIVER

Sitronix Technology Co., Ltd. 

ST7093

PIN DESCRIPTION

NAME I/O Interfaced

FUNCTION

Select registers.

RS

I

MPU

0: Instruction register (for write)

address counter (for read)

1: Data register (for write and read)

Select read or write.

RW_WR

I

MPU

In 68 mode

0: Write

In 80 mode

0: Write

1: Read

1: Not active

Starts data read/write.

E_RD

I

MPU

In 68 mode

0: Not active

In 80 mode

0: Read

1: Enable

1: Not active

Four high order bi-directional tristate data bus

DB4 to DB7 I/O

MPU

pins. Used for data transfer and receive

between the MPU and the ST7093. In serial interface mode

DB7 is SI (input data), DB6 is SCL (serial clock).

Four low order bi-directional tristate data bus

DB0 to DB3 I/O

MPU

pins. Used for data transfer and receive

between the MPU and the ST7093.

These pins are not used during 4-bit operation. (Fixed high)

CSB

I

MPU

Chip select signal. Active low.

RESETB

I

MPU

Reset signal. Active low.

External clock input pin. it must be fixed to “Vss” , when the

CK

I

MPU

internal oscillator circuit is used. In case of the external clock

mode, CK is used as the clock and OS bit should be turn off.

Interface selection

MI

I

MPU

0: 80 mode interface

1: 68 mode interface

DIRS

I

MPU

SEG direction selection

0: SEG1 Æ SEG80

1: SEG80 Æ SEG1

Interface selection valid when PS=1

IF

I

MPU

0: 4 bit bus mode

1: 8 bit bus mode

Interface selection

PS

I

MPU

0: serial mode

1: 4bit/ 8bit bus mode

COM1 to

COM24

O

LCD

Common signals. COMI1 and COMI2 are the same signal

COMI1,COMI2

SEG1 to SEG80 O

LCD

Segment signals

CAP1+, CAP1-

CAP2+, CAP2-

O

Capacitor connection pins for voltage booster

Vout

I/O

Voltage booster output pin

VR

I

Voltage adjust pin between V0 and VSS

Reference voltage selection pin

REF

I

MPU

0: internal regulator is selected

1: external reference voltage input to Vext

Vext

I/O

External reference voltage input

V0 to V4

-

Power supply

Power supply for LCD drive

V0 - Vss = 7 V (Max)

VDD , GND

-

Power supply VDD : 2.4V to 3.6V, GND: 0V

Test 0 to Test3 I

Test pin. open

Note: 1. V0>=V1>=V2>=V3>=V4>=VSS must be maintained

Ver 2.1

6/43

2003/09/23

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