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CM16022ASFAYA-03 Datasheet, PDF (17/26 Pages) List of Unclassifed Manufacturers – LCD MODULE SPECIFICATION | |||
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Confidential Document
10.5 CGRAM
Relationship between CGRAM Addresses, Character Codes (DDRAM) and
Patterns (CGRAM Data)
For 5Ã8 dot character patterns
Character Codes
(DDRAM data)
76543210
CGRAM Address
543210
High
Low
0000â000
0000â001
High
000
001
Low
000
001
010
011
100
101
110
111
000
001
010
011
100
101
110
111
000
001
Character Patterns
(CGRAM data)
76543210
High
Low
ââ â 1 1 1 1 0
10001
10001
11110
10100
Character
Pattern (1)
10010
10001
â â â 0 0 0 0 0 } Cursor position
ââ â10001
01010
11111
00100
11111
Character
Pattern (2)
00100
00100
â â â 0 0 0 0 0 } Cursor position
ââ â
0000â111
111
100
101
110
111
ââ â
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.
Maintain the 8th line data, corresponding to the cursor display position, at 0 as the
cursor display.
If the 8th line data is 1, 1 bits will light up the 8th line regardless of the cursor presence.
3. Character pattern row positions correspond to CGRAM data bits 0 to 4 (bit 4 being
at the left).
4. As shown Table 5, CGRAM character patterns are selected when character code bits
4 to 7 are all 0. However, since character code bit 3 has no effect, the R display example
above can be selected by either character code 00H or 08H.
5. 1 for CGRAM data corresponds to display selection and 0 to non-selection.
â Indicates no effect.
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