S6A0074 Datasheet, PDF (26/68 Pages) Samsung semiconductor – 34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD

S6A0074
34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
Entry Mode Set: (RE = 1)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
0
0
0
1
1
BID
Set the data shift direction of segment in the application set.
BID: Data Shift Direction of Segment
When BID = "Low", segment data shift direction is set to normal order from SEG1 to SEG80.
When BID = "High", segment data shift direction is set to reverse from SEG80 to SEG1.
By using this instruction, the efficiency of application board area can be raised.
- The BID setting instruction is recommended to be set at the same time level of function set instruction.
- DB1 bit must be set to “1”.
Display ON/OFF Control (RE = 0)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
0
0
1
D
C
B
Control display/cursor/blink ON/OFF 1 bit register.
D:
Display ON/OFF control bit
When D = "High", entire display is turned on.
When D = "Low", display is turned off, but display data is remained in DDRAM.
C:
Cursor ON/OFF control bit
When C = "High", cursor is turned on.
When C = "Low", cursor is disappeared in current display, but I/D register remains its data.
B:
Cursor Blink ON/OFF control bit
When B = "High", cursor blink is on, that performs alternate between all the high data and display
character at the cursor position. If fosc has 270kHz frequency, blinking has 370 ms interval.
When B = "Low", blink is off.
Extended Function Set (RE = 1)
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
0
0
0
0
0
0
1
FW
B/W
NW
FW:
B/W:
NW:
Font width control
When FW = "High", display character font width is assigned to 6-dot and execution time becomes 6/5
times than that of 5-dot font width.
The user font, specified in CGRAM, is displayed into 6-dot font width, bit-5 to bit-0,including the leftmost
space bit of CGRAM.(refer to Fig-9)
When FW = "Low", 5-dot font width is set.
Black/white inversion enable bit
When B/W = "High", black/white inversion at the cursor position is set. In this case C/B bit of display
ON/OFF control instruction becomes don't care condition. If fosc has frequency of 270kHz, inversion has
370 ms intervals.
4 Line mode enable bit
When NW = "High", 4 line display mode is set. In this case N bit of function set instruction becomes don't
care condition.
26