HD66712 Datasheet, PDF (71/88 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver

HD66712U
6-dots font width mode (FW = 1)
4 line display mode (NW = 1)
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
1 0 0 0 0 1 DL N 1 BE LP Enable extension resistor.
2 0 0 0 0 0 1 1 0 0 0 4th line scroll enable.
3 0 0 1 0 0 0 0 0 0 1 One dot shift in 4th line to the left.
CPU Wait
40 0 1 0 0 0 0 0 1 0
Two dots shift in 4th line to the left.
CPU Wait
50
60
01
01
0000
CPU Wait
0000
011
100
Three dots shift in 4th line to the left.
Four dots shift in 4th line to the left.
CPU Wait
49 0
50 0
01
01
1101
CPU Wait
0110
111
000
47 dots shift in 4th line to the left.
48 dots shift in 4th line to the left.
Note:
When perfoming a dot scroll with an extended driver, the maximum number or characters
per line decreases by quantity set by the dot scroll. For example, when the maximum
24-dot scroll quantity (4 characters) is used with 6-dot font width and 4-line display,
the maximum numbers of character is 20 – 4 = 16. Notice that in low power mode (LP = 1),
display shift and dot scroll cannot be performed.
Figure 32 Method of Smooth Scroll Display
434