PCF8578 Philips Semiconductors, PCF8578 Datasheet - Page 4

• Manufacturer Part Number: PCF8578
• Description: LCD row/column driver for dot matrix graphic displays
• Manufacturer: Philips Semiconductors

Philips Semiconductors
5
1998 Sep 08
LCD row/column driver for dot matrix
graphic displays
(1) Operates at LCD voltage levels, all other blocks operate at logic levels.
The pin numbers given in parenthesis refer to the LQFP64 package.
BLOCK DIAGRAM
V
TEST
SDA
V DD
LCD
SCL
V 2
V 3
V 4
V 5
9 (20)
10 (21)
11 (22)
12 (23)
13 (24)
14 (25)
6 (12)
2 (8)
1 (7)
POWER-ON
15, 16
RESET
n.c.
FILTERS
INPUT
(14, 15, 17 to 19
26 to 28 36, 47)
n.c.
SUBADDRESS
COUNTER
CONTROLLER
CONTROLLER
I C-BUS
DISPLAY
2
MODE
SA0
AND SENSING
Y DECODER
AMPLIFIERS
Fig.1 Block diagram.
7 (13)
RAM DATA POINTER
Y
4
COMMAND
DECODER
ROW/COLUMN
R31/C31 - R8/C8
DISPLAY RAM
CONTROLLER
X DECODER
DRIVERS
32 x 40-BIT
C39 - C32
OUTPUT
R7 - R0
X
17 - 56
(29 to 35, 37, 38 to 46
48 to 62, 63, 64, 1 to 6)
(1)
DECODER
DISPLAY
PCF8578
GENERATOR
OSCILLATOR
TIMING
Product specification
(10) 4
(16) 8
(11) 5
MSA842
(9) 3
PCF8578
R OSC
SYNC
CLK
V SS
OSC