hd66731a01tb0l Renesas Electronics Corporation., hd66731a01tb0l Datasheet - Page 104

• Manufacturer Part Number: hd66731a01tb0l
• Description: Dot-matrix Liquid Crystal Display Controller/driver Supporting Japanese Kanji, Korean Font Display - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

By connecting the HD66730 to extension drivers, the display can be expanded up to a 1-line/40-character,
2-line/20-character, or a 4-line/10-character display configuration. Bits DT1/0 set the duty drive ratio and
bits NC1/0 set the number of characters per line. In addition, bits NL1/0 sets the number of display lines
during display read control. Table 22 shows the relationship between the number of characters actually
displayed on the liquid crystal panel and the corresponding number of extension drivers needed.
Table 23
Display
Lines
1 line
2 lines
3 lines
4 lines
Notes: 1. Numbers in parentheses = (number of extension segment drivers/number of common drivers)
Interfacing with the Liquid Crystal Panel
2. This is an example when using the 40 output extension drivers, and when Nh represents display
3. The right-edge segment (space between characters) is not displayed in 6-character or 16-
4. Horizontal smooth scroll cannot be performed during an 1-line/40-character, 2-line/20-character,
characters and Nd extension driver outputs, the number of extension drivers needed can
generally be calculated as follows:
[Number of extension drivers] = (12 * Nh – 71 – 1)/Nd]
character display.
3-line/10-character, or 4-line/10-character display.
Drivers
Relationship between the Number of Liquid Crystal Display Characters and Extension
6
Characters
(0/0)
(0/0)
(0/1)
(0/1)
10
Characters
(2/0)
(2/0)
(2/1)
(2/1)
Number of Display Characters per Line
12
Characters
(2/0)
(2/0)
Display
disabled
Display
disabled
16
Characters
(3/0)
(3/0)
Display
disabled
Display
disabled
20
Characters
(5/0)
(5/0)
Display
disabled
Display
disabled
HD66730/HD66731
40
Characters
(11/0)
Display
disabled
Display
disabled
Display
disabled
Duty
Drive
1/14
1/27
1/40
1/53
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