ST7920-0C View Datasheet(PDF) - Sitronix Technology Co., Ltd.
Part Name
Description
MFG CO.
'ST7920-0C' PDF : 49 Pages View PDF
ST7920
Instruction set 2: (RE=1: extended instruction)
Inst.
Code
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Description
Exec time
(540KHZ)
Enter standby mode, any other instruction can terminate.
Standby 0 0 0 0 0 0 0 0 0 1 COM1…32 are halted.
72 us
Scroll or
RAM
SR=1: enable vertical scroll position
0 0 0 0 0 0 0 0 1 SR
Address.
SR=0: enable CGRAM address (basic instruction)
Select
72 us
Select 1 out of 4 line (in DDRAM) and decide whether to
Reverse
0 0 0 0 0 0 0 1 R1 R0 reverse the display by toggling this instruction
72 us
(by line)
R1,R0 initial value is 0,0
DL=1 :8-bit interface
DL=0 :4-bit interface
Extended
1
RE=1: extended instruction set
Function 0 0 0 0 1 DL X
G0
RE
RE=0: basic instruction set
Set
G=1 :graphic display ON
72 us
G=0 :graphic display OFF
Set Scroll
0 0 0 1 AC5 AC4 AC3 AC2 AC1 AC0 SR=1: AC5~AC0 the address of vertical scroll
Address
72 us
Set GDRAM address to address counter (AC)
Set Graphic
Set the vertical address first and followed the horizontal
Display
0 0 0 AC3 AC2 AC1 AC0
001
address by consecutive writings
72 us
RAM
0 AC5 AC4 AC3 AC2 AC1 AC0 Vertical address range: AC5…AC0
Address
Horizontal address range: AC3…AC0
Note:
1. Make sure that ST7920 is not in busy state by reading the busy flag before sending instruction or data. If using delay loop instead, please
make sure the delay time is enough. Please refer to the instruction execution time.
2. “RE” is the selection bit of basic and extended instruction set. After setting the RE bit, the value will be kept. So that the software doesn’t
have to set RE every time when using the same instruction set.
V4.0
17/49
2008/08/18
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