20T202DA1J Pacer Components, 20T202DA1J Datasheet - Page 14

• Manufacturer Part Number: 20T202DA1J
• Description: Vacuum Fluorescent Display Module
• Manufacturer: Pacer Components

2X20 LCD Compatible VFD Module
6.2.4 Display ON/OFF
6.2.5 Cursor/Display Shift
6.2.6 Function Set
This instruction controls various features of the display.
(Blinking is achieved by alternating between a normal and all on display of a character. The cursor blinks with
frequency of about 1.0 Hz and DUTY 50%.)
This instruction shifts the display and/or moves the cursor one character to the left or right without writing DD-RAM.
The R/L bit selects left ward or right ward movement of the display and/or cursor.
This instruction sets the width of data bus line, the number of display line, and brightness control.
This instruction initializes the system, and must be the first instruction executed after power-on.
The IF bit selects a 8-bit or 4-bit bus width interface.
The N bit selects between 1-line or 2-line display.
BR1, BR0 flag controls the brightness of VFD by modulating pulse width of Anode output as follows.
The S/C bit selects movement of the cursor or movement of both the cursor and the display.
* R/L = 1: Shift one character right
* R/L = 0: Shift one character left
*Cursor or Display Shift
* N = 1: Select 2 line display (Using anode output A1 to A80)
* N = 0: Select 1 line display (Using anode output A1 to A40. A41 to A80 fixed Low level).
* BR0, BR1 = (0, 0): Brightness = 100%, (0, 1): Brightness = 75%,
* D = 1: Display ON, D = 0: Display OFF.
* C = 1: Cursor ON,
* B = 1: Blinking ON, B = 0: Blinking OFF.
* S/C = 1: Shift both cursor and display
* S/C = 0: Shift cursor only
* IF = 1: 8-bit CPU interface using DB7 to DB0
* IF = 0: 4-bit CPU interface using DB7 to DB4 (This module should be always chosen by 4-bit CPU interface).
RS = 0
RS = 0
RS = 0
D7
D7
D7
S/C
0
0
0
0
0
1
1
D6
D6
D6
R/L
0
0
0
0
1
0
1
(1, 0): Brightness = 50%,
Move one character to the left
Move one character to the right
Shift one character to the left
Shift one character to the
D5
D5
D5
0
0
1
C = 0: Cursor OFF.
D4
D4
D4
IF
0
1
Cursor Shift
S/C
D3
D3
D3
N
1
20T202DA1J (Rev. 3.0)
R/L
D2
D2
D2
D
*
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(1, 1): Brightness = 25%.
BR1
D1
D1
D1
C
*
No shift
No shift
Shift one character to the left
Shift one character to the right
BR0
D0
D0
D0
B
*
Hex. Range
Hex. Range
Hex. Range
08H ~ 0FH
10H ~ 1FH
20H ~ 3FH
Display Shift