HD66760 Datasheet, PDF (36/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
Sets the I/D and AM bits
Address: N set
First word
Dummy read (invalid data)
GRAM -> Read-data latch
Second word
Read (data of address n)
Read-data latch -> DB15–0
Address: M set
First word
Dummy read (invalid data)
GRAM -> Read-data latch
Second word
Read (data of address)
Read-data latch -> DB15–0
Sets the I/D and AM bits
Address: N set
First word
Dummy read (invalid data)
GRAM -> Read-data latch
Second word
Read (data of address n)
DB15–0 -> GRAM
Automatic address update: N + α
First word
Dummy read (invalid data)
GRAM -> Read-data latch
Second word
Write (data of address n)
DB15–0 -> GRAM
i) Data read to the microcomputer
ii) Logical operation processing in the HD66760
Figure 23 GRAM Read Sequence
Grayscale Palette Control (R30h to R39h)
RK73–00: Specify the R-grayscale level for eight palettes from the 16-grayscale level. For details, see the
Grayscale Palette and Grayscale Palette Table sections.
In four-grayscale display mode, the number of palettes to be used is four. For details, see the Four-grayscale
Display Mode section.
GK73–00: Specify the G-grayscale level for eight palettes from the 16-grayscale level. For details, see the
Grayscale Palette and Grayscale Palette Table sections.
In four-grayscale display mode, the number of palettes to be used is four. For details, see the Four-grayscale
Display Mode section.
BK33–00: Specify the B-grayscale level for four palettes from the 16-grayscale level. For details, see the
Grayscale Palette and Grayscale Palette Table sections.
In four-grayscale display mode, the number of palettes to be used is four. For details, see the Four-grayscale
Display Mode section.