PC85132/232-1 Просмотр технического описания (PDF) - NXP Semiconductors.
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PC85132/232-1 Datasheet PDF : 65 Pages
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NXP Semiconductors
PCA85132
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 21. I2C-bus protocol
A
RAM DATA
A
RAM DATA
AP
mgl752
After acknowledgement, a control byte follows which defines if the next byte is RAM or
command information.
Table 19. Control byte description
Bit
Symbol Value
Description
7
CO
continue bit
0
last control byte
1
control bytes continue
6
RS
register selection
0
command register
1
data register
5 to 0 -
-
not relevant
PCA85132
Product data sheet
MSB
765
CO RS
4 321
not relevant
LSB
0
mgl753
Fig 22. Control byte format
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 Section 7.5.1 and Section 7.5.2.
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 9 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
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