pcf8813 NXP Semiconductors, pcf8813 Datasheet - Page 28

• Manufacturer Part Number: pcf8813
• Description: 67 + 1 X 102 Pixels Matrix Lcd Driver
• Manufacturer: NXP Semiconductors

Philips Semiconductors
11 INSTRUCTIONS
The PCF8813 interfaces via the 8-bit parallel interface, two
different 3-line serial interfaces, 4-wire serial interface or
an I
not require the display clock.
In the case of the parallel and 4-wire serial interface, data
accesses to the PCF8813 can be divided into two areas;
those that define the operating mode of the device, and
those that fill the display RAM; the distinction being the
D/C input. When the D/C input is set to logic 0, the chip will
respond to instructions as defined in Table 5. When the
D/C bit is at logic 1, the chip will send data into the RAM.
When the 3-wire serial interface or the I
used, the distinction between instructions that define the
Table 5 Instruction set
Instructions not expressly defined in this table and reserved instructions are not allowed in PCF8813 applications.
2004 Mar 05
H = 0 or 1
NOP
Function set
Read status byte
Read status byte
Write data
H = 0
Reserved
Display control
Set lower/higher
program range
Set power control
HVgen on/off
Display configuration
(67 + 1)
2
INSTRUCTION
C-bus interface. Processing of the instructions does
102 pixels matrix LCD driver
D/C R/W
0
0
0
0
1
0
0
0
0
0
0
0
0
1
1
0
0
0
0
0
0
0
(MSB)
BUSY
DB7
D7
2
0
0
0
0
0
0
0
0
0
C-bus interface is
DON
DB6
D6
0
0
0
0
0
0
0
0
0
RES
DB5
D5
0
1
0
0
0
0
0
0
0
COMMAND BYTE
28
DB4
MF2
operating mode of the device and those that fill the display
RAM is made respectively by the display data length
instruction (4-line SPI) or by D/C bit in the data stream
(3-line serial interface and I
There are four types of instructions:
In normal use, category 3 instructions are used most
frequently. To lessen the MPU program load, automatic
incrementing by one of the internal RAM address pointers
after each data write is implemented.
MX
D4
0
1
0
0
1
1
1
0
Defining PCF8813 functions such as display
configuration, etc.
Setting internal RAM addresses
Performing data transfer with internal RAM
Other instructions.
DB3
MF1
MY
D3
0
1
0
1
0
0
0
0
DB2
MF0
PD
D2
D0
D
0
0
1
0
0
1
DB1
DS1
D1
V
X
0
0
0
1
1
0
(1)
2
C-bus interface).
(LSB)
PRS
BRS
DB0
DS0
PC
D0
H
0
X
E
(1)
(1)
Product specification
no operation
Power-down
control; entry
mode
read status byte
for serial and
I
reads parallel
interface status
byte
writes data to
RAM
do not use
sets display
configuration
V
range
switch HVgen
on/off
double command
byte: set data
order; top/bottom
row swap mode
2
LCD
C-bus interfaces
DESCRIPTION
PCF8813
programming