PCF8531U/2DA/1 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
'PCF8531U/2DA/1' PDF : 51 Pages View PDF
NXP Semiconductors
VLCD
PCF8531
34 x 128 pixel matrix driver
mgs473
0 °C
T
Fig 13. VLCD as a function of liquid crystal temperature
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).
Table 11. Instruction set
Instruction
I2C-bus
I2C-bus command byte
command[1]
RS R/W DB7 DB6 DB5 DB4
H1 and H0 = don’t care (H independent command page)
NOP
0
0
0
0
0
0
write data
1
0
D7 D6 D5 D4
set default H[1:0] 0
0
0
0
0
0
H1 = 0 and H0 = 0 (function and RAM command page)
instruction set
0
0
0
0
0
0
function set
0
0
0
0
1
0
set Y address of 0
0
0
1
0
0
RAM
set X address of 0
0
1
X6 X5 X4
RAM
H1 = 0 and H0 = 1 (display setting command page)
multiplex rate
0
0
0
0
0
0
display control
0
0
0
0
0
0
bias system
0
0
0
0
0
1
H1 = 1 and H0 = 0 (HV-gen command page)
HV-gen control
0
0
0
0
0
0
HV-gen
configuration
0
0
0
0
0
0
DB3
0
D3
0
1
0
0
X3
0
1
0
0
1
DB2
0
D2
0
0
PD
Y2
X2
1
D
BS2
1
0
DB1
0
D1
0
H1
V
Y1
X1
M1
IM
BS1
PRS
S1
DB0
0
D0
1
H0
0
Y0
X0
M0
E
BS0
HVE
S0
Description
no operation
write data to
display RAM
select H[1:0] = 0
select command
page
power-down
control; entry
mode
set Y address of
RAM; 0 ≤ Y ≤ 5
set X address of
RAM; 0 ≤ X ≤ 127
set multiplex rate
set display
configuration
set bias system
(BSx)
set VLCD
programming
range
set voltage
multiplication
factor
PCF8531
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 16 May 2011
© NXP B.V. 2011. All rights reserved.
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