16t202da1j Pacer Components, 16t202da1j Datasheet - Page 10

• Manufacturer Part Number: 16t202da1j
• Description: 2x16 Lcd Compatible Vfd Module
• Manufacturer: Pacer Components

2X16 LCD Compatible VFD Module
5.2 Interfacing to the MPU
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 display is
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 bit 3 has no
6) ”1” for CG-RAM data corresponds to display selection and 0 to non-selection.
This VFD module can interface in either two 4-bit operations or one 8-bit operation, allowing interfacing with 4or 8 bit
MPUs.
For 4-bit interface data, only four bus lines (DB4 to DB7) are used for transfer. When to use 4-bit parallel data transfer,
DB0 to DB3 keep "H" or "L". The data transfer between the VFD module and the MPU is completed after the 4-bit
data has been transferred twice. As for the order of data transfer the four high order bits (for 8-bit operation, DB4 to
DB7) are transferred before the four low order bits (for 8-bit operation, DB0 to DB3).
The busy flag (BF) are performed before transferring the higher 4 bits. BF checks are not required before transferring
the lower 4 bits.
For 8-bit interface data, all eight bus lines (DB0 to DB7) are used.
bits only). Character codes 00H to 07H (or 08H to 0FH) are assigned to the user-definable characters (see Fig.-11
Character Font Tables). The table on Page - 11 shows the relationship between the character codes, CG-RAM
addresses, and CG-RAM data for each user-definable character.
D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
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.
effect, the “A” display example above can be selected by either character code 00H or 08H.
Character Codes (DD-RAM)
* Relationship between CG-RAM Addresses, DD-RAM and 5*7 Dot Patterns (CG-RAM data).
0
0
0
0
0
0
0
0
0
*
*
*
0
0
0
0
1
0
0
1
0
A5 A4 A3 A2 A1 A0
0
0
0
CG-RAM Address
0
0
1
Fig.-11 CG-RAM Font Design Example
0
1
0
16T202DA1J (Rev. 4.0)
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
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Page - 10 of 17
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
1
0
1
0
0
0
1
0
0
1
0
0
0
*
1
0
0
1
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
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
*
0
1
1
1
1
1
1
*
0
1
1
0
1
1
0
*
0
0
0
0
0
1
0
*
1CH
1CH
0EH
11H
11H
1FH
11H
11H
11H
00H
1EH
11H
11H
1EH
11H
11H
1EH
00H
06H
08H
08H
09H
06H
00H
Pattern Example
Currency Symbol)
(Example of Euro
(Example of "A")
(Example of "B")
Cursor Position
Cursor Position
Cursor Position
CG-RAM #3
CG-RAM #1
CG-RAM #2