pcf8548 NXP Semiconductors, pcf8548 Datasheet - Page 16

• Manufacturer Part Number: pcf8548
• Description: 65 X 102 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
12 INSTRUCTIONS
The instruction format is divided into two modes:
1. If D/C is set LOW, commands can be sent to the chip.
2. If D/C is set HIGH, the DDRAM will be accessed.
Every instruction can be sent in any order to the PCF8548.
Table 1 Instruction set
1999 Aug 16
H = 0 or 1
NOP
Reserved
Function set
Read status byte
Write data
H = 0
Reserved
Set V
Display control
Set HV-gen
stages
Set Y address of
RAM
Set X address of
RAM
H = 1
Reserved
Temperature
control
Display
configuration
Bias system
Reserved
Set V
INSTRUCTION
65
LCD
OP
102 pixels matrix LCD driver
range
D/C
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
R/W
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
PD
B7
D
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
7
V
TRS BRS
B6
D
X
OP6
0
0
0
0
0
0
0
1
0
0
0
0
1
6
6
V
B5
D
X
OP5
X
0
0
1
0
0
0
0
0
0
0
0
0
5
5
COMMAND BYTE
V
MX
B4
D
X
OP4
D
X
0
0
0
0
0
1
0
0
0
0
1
4
4
16
V
MY
B3
D
Y
X
OP3
E
X
0
0
0
0
1
0
0
0
1
0
3
3
3
V
BS
MX
DO
PD
B2
D
Y
X
D
OP2
X
0
0
0
1
0
0
1
2
2
2
2
V
TRS BRS top/bottom row mode set data
TC
BS
MY
B1
D
S1
Y
X
OP1
V
0
0
0
1
X
1
0
1
1
1
1
1
V
PRS V
TC
BS
DO
B0
S0
D
Y
X
OP0
H
X
E
X
X
0
1
0
0
0
0
0
no operation
do not use
Power-down control; entry
mode; extended instruction
set control (H)
read status byte
writes data to RAM
do not use
select
sets display configuration
# of HV-gen voltage
multiplication
sets Y address of RAM:
0
sets X address of RAM:
0
do not use
set temperature coefficient
(TCx)
order
set bias system (BSx)
do not use (reserved for test)
write V
LCD
Y
X
programming range
OP
DESCRIPTION
8
101
to register
Product specification
PCF8548