HD66760 Datasheet, PDF (33/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

Table 23 GRAM Address Range in Four-grayscale Mode (GS = 1)
AD14–AD0
"0000"H–"000C"H
"0100"H–"010C"H
"0200"H–"020C"H
"0300"H–"030C"H
:
"AC00"H–"4C0C"H
"AD00"H–"4D0C"H
"AE00"H–"4E0C"H
"AF00"H–"4F0C"H
GRAM Setting
Bitmap data for COM1
Bitmap data for COM2
Bitmap data for COM3
Bitmap data for COM4
:
Bitmap data for COM77
Bitmap data for COM78
Bitmap data for COM79
Bitmap data for COM80
HD66760
Write Data to GRAM (R22h)
WD15–0 : Write 16-bit data to the GRAM. This data calls each grayscale palette. After a write, the address
is automatically updated according to the AM and I/D bit settings. During the sleep and standby modes, the
GRAM cannot be accessed.
R/W RS DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
W 1 WD15WD14WD13WD12WD11WD10 WD9 WD8 WD7 WD6 WD5 WD4 WD3 WD2 WD1 WD0
Figure 20 Write Data to GRAM Instruction
DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
[GRAM write data]
WD
15
WD
14
WD
13
WD
12
WD
11
WD
10
WD
9
WD
8
WD
7
WD
6
WD
5
WD
4
WD
3
WD
2
WD
1
WD
0
[Eight-grayscale mode] R2 R1 R0 G2 G1 G0 B1 B0 R2 R1 R0 G2 G1 G0 B1 B0
1 pixel
[Four-grayscale mode] C1 C0 C1 C0 C1 C0 C1 C0 C1 C0 C1 C0 C1 C0 C1 C0
1 pixel
Figure 21 GRAM Write Data