PCF8533 Datasheet, PDF (21/36 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates

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R/W = 0
slave address
control byte
S
S 0 1 1 1 0 0 A 0 A Co RS
0
RAM/command byte
M
AS
B
L
SP
B
EXAMPLES
a) transmit two bytes of RAM data
S
S01 1 1 0 0 A0A01
0
A
RAM DATA
A
RAM DATA
AP
b) transmit two command bytes
S
S01 1 1 0 0 A0A10
0
A
COMMAND
A0 0
A
COMMAND
AP
c) transmit one command byte and two RAM bytes
S
S01 1 1 0 0 A0A10
A
0
COMMAND
A0 1
Fig.14 I²C-bus protocol.
A
RAM DATA
A
RAM DATA
AP
MGL752
Co = 0; last control byte.
Co = 1; control bytes continue.
RS = 0; data is a command byte
RS = 1; data is a display byte
MSB
Co RS
LSB
UNUSED
MGL753
Fig.15 Format of control byte.