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PCF8576D Datasheet(PDF) 25 Page - NXP Semiconductors

Part No. PCF8576D
Description  Universal LCD driver for low multiplex rates
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Maker  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
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PCF8576D Datasheet(HTML) 25 Page - NXP Semiconductors

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PCF8576D
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 10 — 14 February 2011
25 of 50
NXP Semiconductors
PCF8576D
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 PCF8576D are defined in Table 7.
[1]
Not used.
All available commands carry a continuation bit C in their most significant bit position as
shown in Figure 18. When this bit is set, it indicates that the next byte of the transfer to
arrive will also represent a command. If this bit is reset, it indicates that the command byte
is the last in the transfer. Further bytes will be regarded as display data (see Table 8).
[1]
The possibility to disable the display allows implementation of blinking under external control.
[2]
Not applicable for static drive mode.
Table 7.
Definition of PCF8576D commands
Command
Operation Code
Reference
Bit
7
6
5
4
3
2
1
0
mode-set
C
1
0
[1]
EBM1
M0
Table 9
load-data-pointer
C
0
P5
P4
P3
P2
P1
P0
Table 10
device-select
C
110
0A2
A1
A0
Table 11
bank-select
C
1
1
1
1
0
I
O
Table 12
blink-select
C
1
1
1
0
A
BF1
BF0
Table 13
Table 8.
C bit description
Bit
Symbol
Value
Description
7C
continue bit
0
last control byte in the transfer; next byte will be regarded
as display data
1
control bytes continue; next byte will be a command too
Table 9.
Mode-set command bits description
Bit
Symbol
Value
Description
7C
0, 1see Table 8
6, 5
-
10
fixed value
4
-
-
unused
3E
display status
0
disabled (blank)[1]
1
enabled
2B
LCD bias configuration[2]
0
1
3 bias
1
1
2 bias
1 to 0
M[1:0]
LCD drive mode selection
01
static; BP0
10
1:2 multiplex; BP0, BP1
11
1:3 multiplex; BP0, BP1, BP2
00
1:4 multiplex; BP0, BP1, BP2, BP3


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