ST7920-0C View Datasheet(PDF) - Sitronix Technology Co., Ltd.
Part Name
Description
MFG CO.
'ST7920-0C' PDF : 49 Pages View PDF
ST7920
Instructions
ST7920 offers basic instruction set and extended instruction set:
Instruction Set 1: (RE=0: Basic Instruction)
Inst.
Code
RS RW DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Description
Exec time
(540KHZ)
Display
Clear
Fill DDRAM with "20H" and set DDRAM address counter (AC)
0000000001
1.6 ms
to "00H".
Return
Home
Set DDRAM address counter (AC) to "00H", and put cursor
0 0 0 0 0 0 0 0 1 X to origin ；the content of DDRAM are not changed
72 us
Entry Mode
Set cursor position and display shift when doing write or read
0 0 0 0 0 0 0 1 I/D S
72 us
Set
operation
Display
Control
D=1: Display ON
0 0 0 0 0 0 1 D C B C=1: Cursor ON
B=1: Character Blink ON
72 us
Cursor
Display
Control
Cursor position and display shift control; the content of
0 0 0 0 0 1 S/C R/L X X
72 us
DDRAM are not changed
DL=1 8-bit interface
Function
0
DL=0 4-bit interface
0 0 0 0 1 DL X
XX
Set
RE
RE=1: extended instruction
RE=0: basic instruction
72 us
Set
Set CGRAM address to address counter (AC)
CGRAM 0 0 0 1 AC5 AC4 AC3 AC2 AC1 AC0 Make sure that in extended instruction SR=0 (scroll or 72 us
Address.
RAM address select)
Set
0
Set DDRAM address to address counter (AC)
DDRAM 0 0 1
AC5 AC4 AC3 AC2 AC1 AC0
AC6
AC6 is fixed to 0
Address.
72 us
Read
Read busy flag (BF) for completion of internal operation, also
Busy Flag 0 1 BF AC6 AC5 AC4 AC3 AC2 AC1 AC0
0 us
Read out the value of address counter (AC)
(BF) & AC.
Write RAM 1
Write data to internal RAM
0 D7 D6 D5 D4 D3 D2 D1 D0
(DDRAM/CGRAM/GDRAM)
72 us
Read RAM 1
Read data from internal RAM
1 D7 D6 D5 D4 D3 D2 D1 D0
(DDRAM/CGRAM/GDRAM)
72 us
V4.0
16/49
2008/08/18
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