hd66710 Renesas Electronics Corporation., hd66710 Datasheet - Page 20

• Manufacturer Part Number: hd66710
• Description: Dot Matrix Liquid Crystal Display Controller/driver
• Manufacturer: Renesas Electronics Corporation.

HD66710
Table 4
Notes: 1. EPROM addresses A11 to A4 correspond to a character code.
310
Programming character patterns
This section explains the correspondence between addresses and data used to program character
patterns in EPROM. The HD66710 character generator ROM can generate 240 5
patterns.
Character patterns
EPROM address data and character pattern data correspond with each other to form a 5 8 dot
character pattern (Table 4).
2. EPROM addresses A2 to A0 specify a line position of the character pattern. EPROM address
3. EPROM data O4 to O0 correspond to character pattern data.
4. Area which are lit (indicated by shading) are stored as 1, and unlit are as 0.
5. The eighth line is also stored in the CGROM, and should also be programmed. If the eighth line
6. EPROM data bits O7 to O5 are invalid. 0 should be written in all bits.
A3 should be set to 0.
is used for a cursor, this data should all be set to zero.
Example of Correspondence between EPROM Address Data and Character Pattern
(5
8 Dots)
A11
0
A10 A9 A8 A7 A6 A5 A4 A3
1
Character code
0
1
EPROM Address
1
0
0
1
“0”
0
0
0
0
0
0
0
0
Line position
A2 A1 A0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
MSB
O4 O3 O2 O1 O0
1
1
1
0 1
0
0
0
0
0 0 0 1
0 0 0 1
0 0 0 1
0 1 0 0
0 1 0 0
0 1 0 0
0 0 0 0
Data
0 1 0
LSB
8 dot character