PCF8532 Datasheet, PDF (22/44 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates

NXP Semiconductors
PCF8532
Universal LCD driver for low multiplex rates
R/W = 0
slave address
control byte
S
0
1
1
1
0
0
S
A
0
0
A
C
O
R
S
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 date bytes
S
S01 1 1 0 0 A0A10
A
0
COMMAND
A0 1
Fig 15. I²C-bus protocol
A
RAM DATA
A
RAM DATA
AP
mgl752
MSB
765
CO RS
4 321
not relevant
LSB
0
Fig 16. Format of control byte
mgl753
Table 7.
Bit
7
6
5 to 0
Load-data-pointer command bit description
Symbol Value
Description
CO
continue bit
0
last control byte
1
control bytes continue
RS
register selection
0
command register
1
data register
-
not relevant
7.17 Command decoder
The command decoder identifies command bytes that arrive on the I²C-bus. The
commands available to the PCF8532 are defined in Table 8.
PCF8532_1
Product data sheet
Rev. 1 — 10 February 2009
© NXP B.V. 2009. All rights reserved.
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