S6A0074 Datasheet, PDF (36/68 Pages) Samsung semiconductor – 34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD

S6A0074
34COM/80SEG DRIVER & CONTROLLER FOR DOT MATRIX LCD
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: 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 Figure 10). When FW = "Low", 5-dot font width is set.
B/W:
NW:
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.
6-bit
S
p
a
c
e
CGROM
Characte
Font
(5-dot)
CGROM
8-bit
6-bit
CGRAM
Characte
Font
(6-dot)
8-bit
CGRAM
Figure 10. 6-dot font width CGROM/CGRAM
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