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PT6314_10 Datasheet, PDF (25/42 Pages) Princeton Technology Corp – Dot Character VFD Controller/Driver IC
PT6314
6.4 “DISPLAY ON/OFF” INSTRUCTION
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
CODE 0
0
0
0
0
0
1
D
C
B
The above instruction controls the various display features:
D=“1”: Display ON
D=“0”: Display OFF
C=“1”: Cursor ON
C=“0”: Cursor OFF
B=“1”: Blinking ON
B=”0”: Blinking OFF
Blinking is achieved by alternating a normal and an all “ON” display of a character. The cursor blinks with a frequency of
approximately 1 Hz and 50% duty.
BLINK
(1Hz)
Cursor Line
During Reset,
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
0
0
0
1
0
0
0
6.5 “CURSOR OR DISPLAY SHIFT” INSTRUCTION
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
CODE 0
0
0
0
0
1
S/C R/L
X
X
The instruction above will shift the display and/or move the cursor one character to the left or right, without DDRAM
reading or writing.
“S/C” Bit selects between the movement of both cursor and display or the movement of the cursor alone. When
“S/C”=”1” the cursor and the display are both shifted. When “S/C”=”0” only the cursor is shifted.
The “R/L” Bit selects the left or right movement direction of the cursor and/or display. When “R/L”=”1” the cursor and/or
display is shifted one character to the right. When “R/L” is ”0” the cursor and/or character is shifted to the left.
The table below summarizes display and cursor shift and movement.
S/C
R/L
Cursor
0
0
Move one character to the left.
0
1
Move one character to the right.
1
0
Move one character to the left with display
1
1
Move one character to the right with display
Display
No shift
No shift
Shift one character to the left.
Shift one character to the right.
V1.5
25
October 2009