20T202DA5JB Pacer Components, 20T202DA5JB Datasheet - Page 9

• Manufacturer Part Number: 20T202DA5JB
• Description: Vfd,vacuum Fluorescent Display
• Manufacturer: Pacer Components

2X20 VFD Module with 2-Wired Interface
1) *: Indicates no effect (Don't care).
2) Character code bits 0 to 2 correspond to CG-RAM address bits 3 to 5 (3 bits: 8 types).
3) CG-RAM address bits 0 to 2 designate the character pattern line position. The 8th line is the cursor position and its
4) Character pattern row positions correspond to CG-RAM data bits 0 to 4 (bit 4 being at the left).
5) CG-RAM character patterns are selected when character code bits 4 to 7 are all 0. However, since character code
6) ” 1” for CG-RAM data corresponds to display selection and ” 0” to non-selection.
* Relationship Between CG-RAM Addresses, Character Code (DD-RAM) and 5*7 (with cursor) Dot
Character Patterns (CG-RAM data).
D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0
display is formed by a logical OR with the cursor. Maintain the 8th line data, corresponding to the cursor display
position, at 0 as the cursor display. If bit 4 of the 8th line data is 1, 1 bit will light up the cursor regardless of the
cursor presence.
bit 3 has no effect, the “A” display example above can be selected by either character code 00H or 08H.
Character Codes (DD-RAM)
0
0
0
0
0
0
0
0
0
0
0
0
*
*
*
*
0
0
0
0
0
0
1
1
0
1
0
1
A5 A4 A3 A2 A1 A0
0
0
0
0
CG-RAM Address
0
0
1
1
0
1
0
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
20T202DA5JB (Rev. 2.0)
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
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0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
D7 D6 D5 D4 D3 D2 D1 D0 Hex.
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
CG-RAM Data
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
0
1
1
1
1
1
1
0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
0
1
0
0
1
0
0
0
*
1
0
0
1
0
0
1
*
1
0
0
0
0
0
1
*
0
1
1
1
1
1
0
*
1
0
0
1
0
0
0
*
1
0
0
1
0
0
1
*
1
1
1
1
1
1
1
*
1
0
1
0
1
0
1
*
1
0
0
1
0
0
0
*
1
0
0
1
0
0
1
*
1
0
0
0
0
0
1
*
1
0
0
0
0
0
1
*
0
1
1
1
1
1
1
*
0
1
1
0
1
1
0
*
0
0
0
0
0
0
0
*
0
0
0
0
0
1
0
*
0EH
1EH
1EH
1EH
0EH
0EH
1CH
1CH
11H
11H
1FH
11H
11H
11H
00H
11H
11H
11H
11H
00H
04H
04H
04H
04H
04H
00H
06H
08H
08H
09H
06H
00H
Pattern Example
Currency Symbol)
(Example of Euro
(Example of "A")
(Example of "B")
(Example of "I")
Cursor Position
Cursor Position
Cursor Position
Cursor Position
CG-RAM #1
CG-RAM #2
CG-RAM #3
CG-RAM #4