pca85232 NXP Semiconductors, pca85232 Datasheet - Page 26

• Manufacturer Part Number: pca85232
• Description: Pca85232 Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA85232
Product data sheet
7.17 Command decoder
The acknowledgement after each byte is made only by the (A0 and A1) addressed
PCA85232. After the last (display) byte, the I
Alternatively a START may be asserted to RESTART an I
The command decoder identifies command bytes that arrive on the I
commands available to the PCA85232 are defined in
Table 9.
Table 10.
[1]
[2]
[3]
Table 11.
[1]
Command
Bit
mode-set
load-data-pointer-MSB
load-data-pointer-LSB
device-select
bank-select
blink-select
frequency-prescaler
Bit
7 to 4
3
2
1 to 0
Bit
7 to 4
3 to 0
Power-on and reset value.
The possibility to disable the display allows implementation of blinking under external control; the enable bit
determines also whether the internal clock signal is available at the CLK pin (see
Not applicable for static drive mode.
Power-on and reset value.
Definition of PCA85232 commands
Mode-set command bit description
Load-data-pointer-MSB command bit description
Symbol
-
E
B
M[1:0]
Symbol
-
P[7:4]
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 8 December 2010
Operation code
7
1
0
0
1
1
1
1
Value
1100
0
1
0
1
01
10
11
00
Value
0000
0000
1001
[1]
[1]
[1]
[1]
6
1
0
1
1
1
1
1
to
5
0
0
1
1
1
1
0
Description
display status
LCD bias configuration
LCD drive mode selection
Description
P7 to P4 defines the first 4 (most significant) bits of
the data pointer that indicates one of the 160 display
RAM addresses
fixed value
fixed value
disabled (blank)
enabled
1
1
static; BP0
1:2 multiplex; BP0, BP1
1:3 multiplex; BP0, BP1, BP2
1:4 multiplex; BP0, BP1, BP2, BP3
⁄
⁄
3
2
bias
2
bias
4
0
0
0
0
1
1
0
C-bus master issues a STOP condition (P).
3
E
P[7:4]
P[3:0]
0
1
0
1
LCD driver for low multiplex rates
Table
[2]
2
2
B
0
0
AB
F[2:0]
C-bus access.
9.
[3]
1
M[1:0]
A[1:0]
I
BF[1:0]
PCA85232
2
Section
C-bus. The
0
O
© NXP B.V. 2010. All rights reserved.
7.5.1).
Reference
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
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