Datasheet
DEM 16228 FGH-PW Product Specification
Version: 3 PAGE:
10
11. CONTROL AND DISPLAY COMMAND
Command RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Execution time
(fosc=270KHz)
Remark
EXT=0 or 1
Clear
Display
0 0 0 0 0 0 0 0 0 1 1.52ms
Write”20H” to DDRAM. And set
DDRAM address to “00H” from AC
Return home 0 0 0 0 0 0 0 0 1 x 0ms
Set DDRAM address to “00H” from AC
and return cursor to its original position i
f
shifted. The contents of DDRAM are not
changed.
Display
on/off
0 0 0 0 0 0 1 D C P 37us
D=1: entire display on
C=1: cursor on
B=1: cursor position on
Cursor
or
Display Shift
0 0 0 0 0 1 S/C R/L x x 37us
Set cursor moving and display shift
control bit, and the direction, without
changing DDRAM data.
function
Set
0 0 0 0 1 DL N EXT x x 37us
DL: interface data is 8/4 bits
N: number of line is 2/1
Read busy
flag&
address
0 1 BF AC6 AC5 AC4 AC3 AC2 AC1 AC0 0us
Whether during internal operation or not
can be known by reading BF. The contents
of address counter can also be read.
Write data
to RAM
1 0 D7 D6 D5 D4 D3 D2 D1 D0 37us
Write data into internal RAM
(DDRAM/CGRAM)
Read data
from RAM
1 1 D7 D6 D5 D4 D3 D2 D1 D0 37us
Read data from internal RAM (DDRAM /
CGRAM)
EXT= 0
Entry mode
Set
0 0 0 0 0 0 0 1 I/D S 37us
Sets cursor move direction and specifies
display shift. These operations are
performed during data write and read.
Set CGRAM
address
0 0 0 1 AC5 AC4 AC3 AC2 AC1 AC0 37us Set CGRAM address in address counter
Set DDRAM
address
0 0 1 AC6 AC5 AC4 AC3 AC2 AC1 AC0 37us Set DDRAM address in address counter
EXT= 1
Bias resistor
select
0 0 0 0 0 0 0 1 Rb1 Rb0 37us
Used internal resister only
provide 1/5 bias mode .
Rb[1:0]=00External Resister
Rb[1:0]=01~11Internal Resistor
COM ,SEG
direction
select
0 0 0 1 0 0 C1 C2 S1 S2 37us
C1：com1~8com8~1
C2：com9~16com16~9
S1：seg1~40seg40~1
S2：seg41~80seg80~41
Set display
data length
0 0 1 L6 L5 L4 L3 L2 L1 L0 37us
To specify the number of
data bytes(3SPI mode)
Note:
Be sure the ST7070 is not in the busy state (BF = 0) before sending an instruction from the MPU to the ST7070.
If an instruction is sent without checking the busy flag, the time between the first instruction and next instruction will
take much longer than the instruction time itself. Refer to Instruction Table for the list of each instruction execution
time.