hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 30
hd66740
Manufacturer Part Number
hd66740
Description
112 X 80-dot Graphics Lcd Controller/driver - Hitachi Semiconductor
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD66740.pdf
(95 pages)
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HD66740
RAM Address Set
AD10-0: Initially set RAM addresses to the address counter (AC). Once the RAM data is written, the
AC is automatically updated according to the I/D bit. This allows consecutive accesses without
resetting addresses.
bit when RDM = 0, and not updated when RDM = 1.
done in every one-byte data. RAM address setting is not allowed in the sleep mode or standby mode.
Table 13
AD10–AD0
"000"H–"06F"H
"080"H–"0EF"H
"100"H–"16F"H
"180"H–"1EF"H
"200"H–"26F"H
"280"H–"2EF"H
"300"H–"36F"H
"380"H–"3EF"H
"400"H–"46F"H
"480"H–"4EF"H
Write Data to RAM
WD7-0 : Write 8-bit data to the CGRAM. After a write, the address is automatically incremented or
decremented by 1 according to the I/D bit setting. During the sleep and standby modes, the CGRAM
cannot be accessed.
AD Bits and CGRAM Settings
Once the RAM data is read, the AC is automatically updated according to the I/D
CGRAM Setting
Bit map data for COM1 to COM8
Bit map data for COM9 to COM16
Bit map data for COM17 to COM24
Bit map data for COM25 to COM32
Bit map data for COM33 to COM40
Bit map data for COM41 to COM48
Bit map data for COM49 to COM56
Bit map data for COM57 to COM64
Bit map data for COM65 to COM72
Bit map data for COM73 to COM80
R/W RS DB7
R/W RS DB7
0
0
0
Figure 13
Figure 12
0
0
1
WD7 WD6 WD5 WD4 WD3 WD2 WD1 WD0
1
1
DB6 DB5 DB4 DB3 DB2 DB1
DB6 DB5 DB4 DB3 DB2 DB1
Write Data to RAM Instruction
0
1
RAM Address Set Instruction
AD5
1
30
AD10
AD4
Set RDM to 1 when read, modify, and write are
AD9
AD3
AD8
AD2 AD1 AD0
AD7 AD6
DB0
DB0
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