PCF8579 Philips Semiconductors, PCF8579 Datasheet - Page 17

• Manufacturer Part Number: PCF8579
• Description: LCD column driver for dot matrix graphic displays
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1997 Apr 01
LCD column driver for dot matrix graphic
displays
Fig.11 (a) Master transmits to slave receiver (WRITE mode); (b) Master reads after sending command string
S
0 1 1 1 1 0
(WRITE commands; READ data); (c) Master reads slave immediately after sending slave address (READ
mode).
slave address
S
A
0
R W
MSA831
/
0 A C
S
S
0 1 1 1 1 0
0 1 1 1 1 0
slave address
slave address
n
1 byte
COMMAND
1 byte
PCF8578s / PCF8579s
PCF8578s / PCF8579s
acknowledge by
acknowledge by
all addressed
S
A
S
A
0
0
all addressed
R W
R W
/
/
1 A
0 A C
A
S
at this moment master
transmitter becomes a
master receiver and
PCF8578/PCF8579 slave
receiver becomes a
slave transmitter
PCF8578s / PCF8579s
0 1 1 1 1 0
acknowledge by
all addressed
n
slave address
COMMAND
n bytes
DATA
0 byte(s)
17
(b)
(a)
(c)
S
A
0
acknowledge
from master
R W
1 A
/
A
A
update data pointers
subaddress counter
DISPLAY DATA
and if necessary,
n
MSA830
n bytes
last byte
DATA
acknowledge
from master
DATA
0 byte(s)
by A0, A1, A2 and A3
selected PCF8578s /
update data pointers
subaddress counter
no acknowledge
PCF8579s only
and if necessary,
acknowledge
from master
A
1
A
update data pointers
subaddress counter
P
P
and if necessary
no acknowledge
last byte
from master
DATA
Product specification
PCF8579
1
MSA832
P