S6A0074 Datasheet, PDF (25/68 Pages) Samsung semiconductor – 34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD

34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
S6A0074
Display Clear
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
0
0
0
0
0
1
Clear all the display data by writing "20H" (space code) to all DDRAM address, and set DDRAM address to "00H"
into AC (address counter). Return cursor to the original status, namely, bring the cursor to the left edge on first
line of the display. Make entry mode increment (I/D = "1").
Return Home: (RE = 0)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
0
0
0
0
1
X
Return Home is cursor return home instruction. Set DDRAM address to "00H" into the address counter. Return
cursor to its original site and return display to its original status, if shifted. Contents of DDRAM does not change.
Power Down Mode Set: (RE = 1)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
1
0
0
0
0
0
0
0
1
PD
Power down mode enable bit set instruction.
PD = “High”, it makes S6A0074 suppress current consumption except the current needed for data storage by
executing next three functions.
1. make the output value of all the COM / SEG ports VDD
2. disable voltage converter to remove the current through the divide resistor of power supply.
This instruction can be used as power sleep mode.
When PD = “Low” , power down mode becomes disabled.
Entry Mode Set: (RE = 0)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
0
0
0
1
I/D
S
Set the moving direction of cursor and display.
I/D: Increment/decrement of DDRAM address (cursor or blink)
When I/D = "High", cursor/blink moves to right and DDRAM address is increased by 1.
When I/D = "Low", cursor/blink moves to left and DDRAM address is decreased by 1.
- CGRAM/SEGRAM operates the same as DDRAM, when read from or write to CGRAM/SEGRAM.
When S = "High", after DDRAM write, the display of enabled line by DS1 - DS4 bits in the shift enable instruction
is shifted to the right (I/D = "0") or to the left (I/D = "1"). But it will seem as if the cursor does not move. When S =
"Low", or DDRAM read, or CGRAM/SEGRAM read/write operation, shift of display like this function is not
performed.
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