NJU6624C New Japan Radio, NJU6624C Datasheet - Page 6

• Manufacturer Part Number: NJU6624C
• Description: 14-CHARACTER 1-LINE DOT MATRIX LCD CONTROLLER DRIVER with SMOOTH SCROLL FUNCTION
• Manufacturer: New Japan Radio

(1-5)Character Generator RAM ( CG RAM )
(1-5)Character Generator RAM ( CG RAM )
The character generator RAM ( CG RAM ) can store any kind of character pattern in 5 x 7 dots written by the user
The character generator RAM ( CG RAM ) can store any kind of character pattern in 5 x 7 dots written by the user
program to display user's original character pattern. The CG RAM can store 32 kind of character in 5 x 7 dots
program to display user's original character pattern. The CG RAM can store 32 kind of character in 5 x 7 dots
mode.
mode.
To display user's original character pattern stored in the CG RAM, the address data (00)
To display user's original character pattern stored in the CG RAM, the address data (00)
to the DD RAM as shown in Table 2.
to the DD RAM as shown in Table 2.
Table 3. shows the correspondence among the character pattern, CG RAM address and Data.
Table 3. shows the correspondence among the character pattern, CG RAM address and Data.
Notes :
Notes :
Table 3. Correspondence of CG RAM address, DD RAM character code
Table 3. Correspondence of CG RAM address, DD RAM character code
1. Character code bit 0 to 4 correspond to the CG RAM address bit 3 to 7(5bits:32 patterns).
1. Character code bit 0 to 4 correspond to the CG RAM address bit 3 to 7(5bits:32 patterns).
2. CG RAM address 0 to 2 designate character pattern line position. The 8th line is Don't care line.
2. CG RAM address 0 to 2 designate character pattern line position. The 8th line is Don't care line.
3. Character pattern row position correspond to the CG RAM data bits 0 to 4 are shown above.
3. Character pattern row position correspond to the CG RAM data bits 0 to 4 are shown above.
4. CG RAM character patterns are selected when character code of DD RAM bits 5 to 7 are all "0"
4. CG RAM character patterns are selected when character code of DD RAM bits 5 to 7 are all "0"
5. "1" for CG RAM data corresponds to display On and "0" to display Off.
5. "1" for CG RAM data corresponds to display On and "0" to display Off.
In case of input CG RAM data continuously, invalid address are Cursor position automatically.
In case of input CG RAM data continuously, invalid address are Cursor position automatically.
and these are addressed by character code bits 0 and 1.
and these are addressed by character code bits 0 and 1.
Upperbit
Character Code
(DD RAM Data) CG RAM Address
7 6 5 4 3 2 1 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1
0 0 0 1 1 1 1 1
.
.
.
.
.
Lower bit
Upperbit
0 0 0 0 0
0 0 0 0 1
1 1 1 1 1
7 6 5 4 3 2 1 0
.
.
.
.
.
and CG RAM character pattern( 5 x 7 dots )
and CG RAM character pattern( 5 x 7 dots )
Lower bit
0 0 0
0 1 0
0 0 0
0 1 0
0 0 0
0 0 1
0 1 1
1 0 0
1 1 0
0 0 1
0 1 1
1 0 0
1 1 0
0 0 1
1 0 0
1 1 0
1 0 1
1 1 1
1 0 1
1 1 1
1 0 1
1 1 1
.
.
.
.
.
Upper
Character
(CG RAM
bit
Pattern
1
0
1 1 1 1 1
0 0
1 1 1 1 1
0 0
0 0
* * * * *
4 3 2 1 0
1 1 1 1
1
1
1 1 1 1
1
1
1
* * * * *
Data)
0 0 0
0 0 0
0 0 0
0
0 0
0 0 0
1
1
0
1
1
1
.
.
.
.
.
Lower
0 0
1
1
0 0
0 0
0 0
bi t
1
0
1
1
0
0
1
0
<= Cursor Position
<= Cursor Position
Character Pattern
Character Pattern
NJU6624C
NJU6624C
Example(1)
Example(2)
H H
-(1F)
-(1F)
*=Don't care
*=Don't care
H H
should be written
should be written