HD66710 Datasheet, PDF (62/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
Low Power Mode
When LP bit is 1 and the EXT pin is low (without an extended driver), the HD66710 operates in low
power mode. In 1-line display mode, the HD66710 operates on a 4-division clock, and in 2-line or 4-line
display mode, it operates on 2-division clock. So, instruction execution takes four times or twice as long.
Notice that in this mode, display shift and scroll cannot be performed. Clear display shift with the return
home instruction, and the horizontal scroll quantity.
Extended register enable
Clear horizontal scroll quantity
HDS = “000”
Set a low power mode
Return home
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 1 DL N 1 BE 0
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 1 0 0 0 0 AS2 AS1 AS0
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 1 DL N 1 BE 1
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00000000 10
Low power operation
Reset a power mode
Note: In this operation, instruction execution time
takes four times or twice as long.
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 1 DL N 1 BE 0
Return home
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00000000 10
Figure 29 Low Power Mode Operation
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