PCA85133 Datasheet, PDF (23/44 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates

NXP Semiconductors
PCA85133
Universal LCD driver for low multiplex rates
7.17 Command decoder
The command decoder identifies command bytes that arrive on the I²C-bus. The
commands available to the PCA85133 are defined in Table 9.
Table 9. Definition of commands
Command
Operation code
Reference
Bit
7
6
5
4
3
2
1
0
mode-set
1
1
0
0
E
B
M1 M0 Table 10
load-data-pointer
0
P6 P5 P4 P3 P2 P1 P0 Table 11
device-select
1
1
1
0
0
A2 A1 A0 Table 12
bank-select
1
1
1
1
1
0
I
O Table 13
blink-select
1
1
1
1
0
A
BF1 BF0 Table 14
Table 10. Mode-set command bit description
Bit
Symbol Value
Description
7 to 4 -
1100
fixed value
3
E
display status^[1]
0
disabled (blank)
1
enabled
2
B
LCD bias configuration
1 to 0
0
1
M[1:0]
1_{⁄3 bias}
1_{⁄2 bias}
LCD drive mode selection
01
static; 1 backplane
10
1:2 multiplex; 2 backplanes
11
1:3 multiplex; 3 backplanes
00
1:4 multiplex; 4 backplanes
[1] The possibility to disable the display allows implementation of blinking under external control.
Table 11. Load-data-pointer command bit description
See Section 7.11.
Bit
Symbol Value
Description
7
-
0
fixed value
6 to 0
P[6:0]
0000000 to 7-bit binary value of 0 to 79, transferred to the data pointer to
1001111 define one of 80 display RAM addresses
Table 12. Device-select command bit description
See Section 7.12.
Bit
Symbol Value
Description
7 to 3 -
1110 0
fixed value
2 to 0
A[2:0]
000 to 111 3-bit binary value of 0 to 7, transferred to the subaddress
counter to define one of 8 hardware subaddresses
PCA85133_1
Product data sheet
Rev. 1 — 23 October 2009
© NXP B.V. 2009. All rights reserved.
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