PCF8579 Datasheet, PDF (17/40 Pages) NXP Semiconductors – LCD column driver for dot matrix graphic displays

Philips Semiconductors
LCD column driver for dot matrix graphic
displays
Product specification
PCF8579
R/W
slave address
acknowledge by
all addressed
PCF8578s / PCF8579s
S
S ^{0 1 1 1 1 0 A 0 AC}
COMMAND
A
0
acknowledge
by A0, A1, A2 and A3
selected PCF8578s /
PCF8579s only
DISPLAY DATA
A_P
1 byte
n 0 byte(s)
(a)
n 0 byte(s)
MSA830
update data pointers
and if necessary,
subaddress counter
acknowledge by
all addressed
PCF8578s / PCF8579s
slave address
S
S ^{0 1 1 1 1 0 A 0 AC}
0
COMMAND
slave address
S
A _S 011110A1A
0
R/W
n 1 byte
R/W
at this moment master
transmitter becomes a
master receiver and
PCF8578/PCF8579 slave
receiver becomes a
slave transmitter
(b)
acknowledge
from master
no acknowledge
from master
DATA
A
DATA
1_P
n bytes
last byte
update data pointers
and if necessary
subaddress counter
MSA832
acknowledge by
all addressed
PCF8578s / PCF8579s
slave address
S
S ^011110A1A
0
DATA
acknowledge
from master
no acknowledge
from master
A
DATA
1_P
MSA831
R/W
n bytes
(c)
last byte
update data pointers
and if necessary,
subaddress counter
Fig.11 (a) Master transmits to slave receiver (WRITE mode); (b) Master reads after sending command string
(WRITE commands; READ data); (c) Master reads slave immediately after sending slave address (READ
mode).
1997 Apr 01
17