pca85132 NXP Semiconductors, pca85132 Datasheet - Page 24

• Manufacturer Part Number: pca85132
• Description: Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA85132_1
Product data sheet
Fig 16. I
EXAMPLES
a) transmit two bytes of RAM data
b) transmit two command bytes
c) transmit one command byte and two RAM date bytes
S 0 1 1 1 0
S 0 1 1 1 0
S 0 1 1 1 0
S 0 1 1 1 0
2
slave address
C-bus protocol
0
0
0
0
R/W = 0
S
A
0
S
A
0
S
A
0
S
A
0
0
0
0
0
After acknowledgement, a control byte follows which defines if the next byte is RAM or
command information. The control byte also defines if the next byte is a control byte or
further RAM or command data.
Table 8.
In this way it is possible to configure the device and then fill the display RAM with little
overhead.
The command bytes and control bytes are also acknowledged by all addressed
PCA85132 connected to the bus.
The display bytes are stored in the display RAM at the address specified by the data
pointer and the subaddress counter; see
Bit
7
6
5 to 0
A
A
A
A
Fig 17. Control byte format
C
O
0 1
1 0
1 0
R
S
control byte
Symbol
CO
RS
-
Control byte description
All information provided in this document is subject to legal disclaimers.
A
A
A
A
M
S
B
RAM/command byte
Value
0
1
0
1
COMMAND
COMMAND
RAM DATA
Rev. 01 — 6 May 2010
MSB
S
B
L
CO
7
P
A
A
A
0 0
0 1
Description
continue bit
register selection
not relevant
RS
6
last control byte
control bytes continue
command register
data register
RAM DATA
5
Section 7.11
4
not relevant
3
A
A
A
P
2
COMMAND
RAM DATA
LCD driver for low multiplex rates
1
and
mgl753
0
LSB
Section
A
A
P
7.12.
PCA85132
RAM DATA
© NXP B.V. 2010. All rights reserved.
mgl752
A
P
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