hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 71

• Manufacturer Part Number: hd66712u
• Description: Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66712U
434
Note: When perfoming a dot scroll with an extended driver, the maximum number or characters
49
50
1
2
3
4
5
6
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.
RS R/W
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Figure 32 Method of Smooth Scroll Display
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
0
CPU Wait
CPU Wait
CPU Wait
CPU Wait
CPU Wait
6-dots font width mode (FW = 1)
4 line display mode (NW = 1)
1 DL N
0
0
0
0
0
1
1
1
0
0
0
0
0
1
1
0
0
0
0
1
0
1 BE LP
0
0
0
0
1
1
0
0
0
1
1
0
1
0
0
1
0
1
0
1
0
Enable extension resistor.
4th line scroll enable.
One dot shift in 4th line to the left.
Two dots shift in 4th line to the left.
Three dots shift in 4th line to the left.
Four dots shift in 4th line to the left.
47 dots shift in 4th line to the left.
48 dots shift in 4th line to the left.