SED1330F Datasheet, PDF (99/148 Pages) List of Unclassifed Manufacturers – LCD Controller ICs

6.2 – 6.3
6.0 Character Generator
Table 22. Character mapping
Item
Parameter
Remarks
Internal/external character generator selection M0
1 to 8 pixels
M2 = 0
Character field height 9 to 16 pixels
M2 = 1
Greater than 16 pixels Graphics mode (8 bits × 1 line)
Internal CG ROM/RAM select
External CG ROM/RAM select
Automatic
Determined by the
character code
CG RAM bit 6 correction
M1
CG RAM data storage address
Specified with CG RAM ADR
command
Can be moved anywhere in the
display memory address space
External CG ROM
address
192 characters or less Other than the area of Figure 58
More than 192 characters
Set SAG to F000H and overly
SAG and the CG ROM table.
6.3 Setting the Character Generator Address
The CG RAM addresses in the VRAM address space
are not mapped directly from the address in the SAG
register. The data to be displayed is at a CG RAM
address calculated from SAG + character code +
ROW select address. This mapping is shown in Tables
23 and 24.
Table 23. Character fonts, number of lines ≤ 8 (M2 = 0, M1 = 0)
SAG
Character code
+ROW select address
CG RAM address
A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
0 0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 R2 R1 R0
VA15 VA14 VA13 VA12 VA11 VA10 VA9 VA8 VA7 VA6 VA5 VA4 VA3 VA2 VA1 VA0
Table 24. Character fonts, 9 ≤ number of lines ≤ 16 (M2 = 1, M1 = 0)
SAG
Character code
+ROW select address
CG RAM address
A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
0 0 0 0 D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 R3 R2 R1 R0
VA15 VA14 VA13 VA12 VA11 VA10 VA9 VA8 VA7 VA6 VA5 VA4 VA3 VA2 VA1 VA0
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