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PCF8534AU/DA/1 датащи(PDF) 22 Page - NXP Semiconductors

номер детали PCF8534AU/DA/1
подробное описание детали  Universal LCD driver for low multiplex rates
PDF  44 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8534AU/DA/1 датащи(HTML) 22 Page - NXP Semiconductors

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PCF8534A_3
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 03 — 10 November 2008
22 of 44
NXP Semiconductors
PCF8534A
Universal LCD driver for low multiplex rates
8.3 Command decoder
The command decoder identifies command bytes that arrive on the I2C-bus. There are
five commands:
Fig 17. I2C-bus protocol
EXAMPLES
a) transmit two bytes of RAM data
mgl752
S
A
0
S 0 1110
0
0
control byte
slave address
RAM/command byte
RAM DATA
M
S
B
L
S
B
A
A
P
R/W = 0
S
A
0
S 0 1110
0
0 1
0
A
A
A
P
RAM DATA
A
b) transmit two command bytes
COMMAND
S
A
0
S 0 1110
0
1 0
0
A
A
A
P
COMMAND
A
A
c) transmit one command byte and two RAM date bytes
COMMAND
S
A
0
S 0 1110
0
1 0
00
01
0
A
A
A
P
RAM DATA
A
RAM DATA
A
A
C
O
R
S
Table 9.
Definition of commands
Command
Opcode
Reference
Mode set
1
100E
B
M1
M0
Table 10
Load data pointer
0
P6
P5
P4
P3
P2
P1
P0
Table 11
Device select
1
1100A2
A1
A0
Table 12
Bank select
1
11110I
O
Table 13
Blink select
1
1110A
BF1
BF0
Table 14
Table 10.
Mode set command bit description
Bit
Symbol
Value
Description
7 to 4
-
1100
fixed value
3E
display status
the possibility to disable the display allows implementation of
blinking under external control
0
disabled (blank)
1
enable
2B
LCD bias configuration
0
1
⁄
3 bias
1
1
⁄
2 bias



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