PCF8578H(1997) Ver la hoja de datos (PDF) - Philips Electronics

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PCF8578H
(Rev.:1997)

LCD row/column driver for dot matrix graphic displays

Philips Electronics 

Philips Semiconductors

LCD row/column driver for dot matrix

graphic displays

5 BLOCK DIAGRAM

Product specification

PCF8578

VDD

V2

V3

V4

V5

VLCD

TEST

9 (20)

10 (21)

11 (22)

12 (23)

13 (24)

14 (25)

6 (12)

POWER-ON

RESET

C39 - C32

R31/C31 - R8/C8

R7 - R0

17 - 56

(29 to 35, 37, 38 to 46

48 to 62, 63, 64, 1 to 6)

(1)

ROW/COLUMN

DRIVERS

PCF8578

DISPLAY

MODE

CONTROLLER

OUTPUT

CONTROLLER

Y DECODER

AND SENSING

AMPLIFIERS

32 x 40-BIT

DISPLAY RAM

DISPLAY

DECODER

X DECODER

SUBADDRESS

COUNTER

RAM DATA POINTER

Y

X

(9) 3

TIMING

GENERATOR

(10) 4

SYNC

CLK

SCL

SDA

2 (8)

1 (7)

INPUT

FILTERS

I2C-BUS

CONTROLLER

15, 16

n.c.

(14, 15, 17 to 19

26 to 28 36, 47)

n.c.

7 (13)

SA0

COMMAND

DECODER

(16) 8

OSCILLATOR

(11) 5

MSA842

OSC

R OSC

VSS

(1) Operates at LCD voltage levels, all other blocks operate at logic levels.

The pin numbers given in parenthesis refer to the LQFP64 package.

Fig.1 Block diagram.

1997 Mar 28

4

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