PCA85133 NXP [NXP Semiconductors], PCA85133 Datasheet - Page 21

• Manufacturer Part Number: PCA85133
• Description: Universal LCD driver for low multiplex rates
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
PCA85133_1
Product data sheet
Fig 15. 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
7.16.5 Input filters
7.16.6 I
0
0
0
0
R/W = 0
S
A
S
A
S
A
S
A
0
0
0
0
0
0
0
0
To enhance noise immunity in electrically adverse environments, RC low-pass filters are
provided on the SDA and SCL lines.
Two I
The least significant bit of the slave address is bit R/W. The PCA85133 is a write-only
device. It will not respond to a read access, so this bit should always be logic 0. The
second bit of the slave address is defined by the level tied at input SA0. Two types of
PCA85133 can be distinguished on the same I
The I
condition (S) from the I
slave addresses. All PCA85133 with the same SA0 level acknowledge in parallel to the
slave address. All PCA85133 with the alternative SA0 level ignore the whole I
transfer.
After acknowledgement, the control byte is sent, defining if the next byte is a RAM or
command information. The control byte also defines if the next byte is a control byte or
further RAM or command data (see
configure the device and then fill the display RAM with little overhead.
A
A
A
A
2
•
•
C-bus protocol
C
O
0 1
1 0
1 0
R
S
Up to 16 PCA85133 on the same I
The use of two types of LCD multiplex drive modes on the same I
2
2
control byte
C-bus protocol is shown in
C-bus slave addresses (0111 000 and 0111 001) are reserved for the PCA85133.
A
A
A
A
M
S
B
RAM/command byte
COMMAND
COMMAND
RAM DATA
Rev. 1 — 23 October 2009
2
C-bus master which is followed by one of the available PCA85133
L
S
B
P
A
A
A
Figure
0 0
0 1
Figure 16
RAM DATA
2
C-bus for very large LCD applications
15. The sequence is initiated with a START
Universal LCD driver for low multiplex rates
and
2
C-bus which allows:
A
A
A
P
Table
COMMAND
RAM DATA
8). In this way it is possible to
A
A
P
PCA85133
RAM DATA
2
C-bus
© NXP B.V. 2009. All rights reserved.
2
C-bus
mgl752
A
P
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