ST7571 Sitronix Technology, ST7571 Datasheet - Page 44

• Manufacturer Part Number: ST7571
• Description: 4 Gray Scale Dot Matrix LCD Controller/Driver
• Manufacturer: Sitronix Technology

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ST7571
9.1.24 RESET
This is software reset. It resets internal registers. The software reset is different with a hardware reset. This instruction
cannot initialize the LCD power supply, which is initialized by a hardware reset (refer to section 7.5 RESET CIRCUITS).
9.1.25 Set Display Data Length (only for 8-bit 3-Line SPI Mode)
This 2-byte instruction is used in 3-Line SPI mode only. In 3-Line SPI mode, A0 is not used and “Set Display Data Length”
instruction is used to indicate the number of display data bytes which are going to be transmitted. The 1
mode, and the 2
string is handled as instruction. The 3-Line SPI mode supports write-access only.
The 1
The 2
9.1.26 NOP
No operation
Ver 1.5a
D7
A0
A0
A0
A0
0
0
0
0
1
1
1
0
x
x
:
st
nd
Instruction: Set Display Data Length Command (Only Write Mode)
Instruction: Set Display Data Length Counter
R/W
R/W
R/W
R/W
nd
D6
0
0
0
0
1
1
1
0
x
x
:
byte sets the data bytes, which will be written, into internal counter. The next byte after the display data
DB7
DB7
DB7
DB7
D7
D5
1
1
0
0
0
1
1
1
1
:
DB6
DB6
DB6
DB6
D6
D4
1
1
0
0
0
1
1
1
1
:
DB5
DB5
DB5
DB5
D5
D3
1
1
0
0
0
1
1
1
1
:
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DB4
DB4
DB4
DB4
D4
D2
0
0
0
0
0
1
1
1
0
:
DB3
DB3
DB3
DB3
D3
D1
0
1
0
0
1
0
1
1
0
:
DB2
DB2
DB2
DB2
D2
D0
0
0
0
1
0
1
0
1
0
:
Display Data Length
DB1
DB1
DB1
DB1
D1
1
0
1
st
254
255
256
byte sets the
1
2
3
:
2009/7/21
DB0
DB0
DB0
DB0
D0
0
0
1