HD66710 Datasheet, PDF (22/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
Table 5
Example of Correspondence between Character Code and Character Pattern (5 × 8
Dots) in CGRAM (cont)
b) When Character Pattern in 6 × 8 Dots
Character code (DDRAM data)
CGRAM address
MSB CGRAM data
LSB
D7 D6 D5 D4 D3 D2 D1 D0 A5 A4 A3 A2 A1 A0 O7 O6 O5 O4 O3 O2 O1 O0
0000*000
000
000
001
010
011
100
101
110
111
**
010001
010001
010001
001010
000100
000100
000100
000000
0000*111
111
000
001
010
011
100
101
110
111
**
010001
010001
010001
001010
000100
000100
000100
000000
Character
pattern
(1)
Character
pattern
(8)
Notes: 1. Character code bits 0 to 2 correspond to CGRAM address bits 3 to 5 (3 bits: 8 types).
2. CGRAM address bits 0 to 2 designate the character pattern line position. The 8th line is the
cursor position and its display is formed by a logical OR with the cursor.
3. The character data is stored with the rightmost character element in bit 0, as shown in Table 5.
Characters with 5 dots in width (FW = 0) are stored in bits 0 to 4, and characters with 6 dots in
width (FW = 1) are stored in bits 0 to 5.
4. When the upper four bits (bits 7 to 4) of the character code are 0, CGRAM is selected.
Bit 3 of the character code is invalid (*). Therefore, for example, the character codes 00
(hexadecimal) and 08 (hexadecimal) correspond to the same CGRAM address.
5. A set bit in the CGRAM data corresponds to display selection, and 0 to non-selection.
6. When the BE bit of the function set register is 1, pattern blinking control of the lower six bits is
controlled using the upper two bits (bits 7 and 6) in CGRAM.
When bit 7 is 1, of the lower six bits, only those which are set are blinked on the display.
When bit 6 is 1, a bit 4 pattern can be blinked as for a 5-dot font width, and a bit 5 pattern can
be blinked as for a 6-dot font width.
* Indicates no effect.
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