HD66750 Datasheet, PDF (35/96 Pages) Hitachi Semiconductor – 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions

HD66750/1
RAM Write Data Mask
WM15-0: In writing to the CGRAM, these bits mask writing in a bit unit. When WM15 = 1, this bit masks
the write data of DB15 and does not write to the CGRAM. Similarly, the WM14Ð0 bits mask the write data
of DB14Ð0 in a bit unit. However, when AM = 10, the write data is masked with the set values of VM15Ð0
for the odd-times CGRAM write. It is also masked automatically with the reversed set values of VM15Ð0
for the even-times CGRAM write. For details, see the Graphics Operation Function section.
R/W RS DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 1 ^{VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM VM}
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Figure 17 RAM Write Data Mask Instruction
RAM Address Set
AD10-0: Initially set CGRAM addresses to the address counter (AC). Once the CGRAM data is written,
the AC is automatically updated according to the AM1Ð0 and I/D bit settings. This allows consecutive
accesses without resetting addresses. Once the CGRAM data is read, the AC is not automatically updated.
CGRAM address setting is not allowed in the sleep mode or standby mode.
R/W RS DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
01
*
**
*
*
AD
10
AD9 AD8 AD7 AD6 AD5 AD4 AD3 AD2 AD1 AD0
Figure 18 RAM Address Set Instruction
Table 15 AD Bits and CGRAM Settings
AD10ÐAD0
"000"HÐ"00F"H
"010"HÐ"01F"H
"020"HÐ"02F"H
"030"HÐ"03F"H
:
"760"HÐ"76F"H
"770"HÐ"77F"H
"780"HÐ"78F"H
"790"HÐ"79F"H
"7A0"HÐ"7AF"H
"7B0"HÐ"7BF"H
"7C0"HÐ"7CF"H
"7D0"HÐ"7DF"H
"7E0"HÐ"7EF"H
"7F0"HÐ"7FF"H
CGRAM Setting
Bitmap data for COM1
Bitmap data for COM2
Bitmap data for COM3
Bitmap data for COM4
:
Bitmap data for COM119
Bitmap data for COM120
121st raster-row data (appeared at vertical scrolling)
122nd raster-row data (appeared at vertical scrolling)
123rd raster-row data (appeared at vertical scrolling)
124th raster-row data (appeared at vertical scrolling)
125th raster-row data (appeared at vertical scrolling)
126th raster-row data (appeared at vertical scrolling)
127th raster-row data (appeared at vertical scrolling)
128th raster-row data (appeared at vertical scrolling)
35