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PCF8531 Datasheet(PDF) 23 Page - NXP Semiconductors

Part # PCF8531
Description  34 x 128 pixel matrix driver
PDF  44 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8531 Datasheet(HTML) 23 Page - NXP Semiconductors

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PCF8531_4
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 04 — 13 June 2008
23 of 44
NXP Semiconductors
PCF8531
34 x 128 pixel matrix driver
Linear temperature compensation is supported in the PCF8531. The temperature
coefficient of VLCD can be selected from eight values by setting bits TC[2:0] (see
Table 13).
[1]
R/W is set to the slave address byte; Co and RS are set in the control byte.
Fig 12. VLCD as a function of liquid crystal temperature
mgs473
T
VLCD
0
°C
Table 11.
Instruction set
Instruction
I2C-bus
command[1]
I2C-bus command byte
Description
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
H1 and H0 = don’t care (H independent command page)
NOP
0000000000no operation
Write data
1
0
D7
D6
D5
D4
D3
D2
D1
D0
write data to
display RAM
Set default H[1:0]
0
0
00000001
select H[1:0] = 0
H1 = 0 and H0 = 0 (function and RAM command page)
Instruction set
0
0
000010H1
H0
select command
page
Function set
0
0
00100PD
V
0power-down
control; entry
mode
Set Y address of
RAM
0001000Y2
Y1
Y0
Set Y address of
RAM; 0
≤ Y ≤ 5
Set X address of
RAM
0
0
1
X6
X5
X4
X3
X2
X1
X0
Set X address of
RAM; 0
≤ X ≤ 127
H1 = 0 and H0 = 0 (display setting command page)
Multiplex rate
0
0
000001M1
M0
Display control
0
0
00001D
IM
E
Bias system
0
0
00010BS2
BS1
BS0
H1 = 0 and H0 = 0 (HV-gen command page)
HV-gen control
0
0
000001PRS
HVE
HV-gen
configuration
00000010S1
S0
Temperature control 0
0
00100TC2
TC1
TC0
Test modes
0
0
0
1
X
X
XXXX
VLCD control
0
0
1
VOP6
VOP5
VOP4
VOP3
VOP2
VOP1
VOP0



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