hd66717 Renesas Electronics Corporation., hd66717 Datasheet - Page 14

• Manufacturer Part Number: hd66717
• Description: Low-power Dot-matrix Liquid Crystal Display Controller/driver -
• Manufacturer: Renesas Electronics Corporation.

Table 4
Display-
Line Mode
1-line
(NL = 00)
2-line
(NL = 01)
3-line
(NL = 10)
4-line
(NL = 11)
Character Generator ROM (CGROM)
The character generator ROM generates 5
It can generate 240 5
mask-programmed ROM (see the Modifying Character Patterns section.)
Character Generator RAM (CGRAM)
The character generator RAM of 32
fonts. In the case of 5
Write the character codes at addresses 00H to 03H into DDRAM to display the character patterns stored
in CGRAM.
Segment RAM (SEGRAM)
The segment RAM is used to enable control of segments such as an icon and a mark by the user program.
Segments and characters are driven by a multiplexing drive method.
SEGRAM has a capacity of 8
While COMS1 and COMS2 outputs are being selected, SEGRAM is read and segments (icons and marks)
are displayed by a multiplexing drive method (20 segments each during COMS1 and COMS2 selection).
Bits in SEGRAM corresponding to segments to be displayed are directly set by the MPU, regardless of
the contents of DDRAM and CGRAM.
Display-Line Modes, Display-Start Line, and DDRAM Addresses
Duty
Ratio Common Pins
1/10
1/18
1/26
1/34
COM1–COM8
COM1–COM8
COM9–COM16
COM1–COM8
COM9–COM16
COM17–COM24
COM1–COM8
COM9–COM16
COM17–COM24
COM25–COM32
8-dot character patterns. User-defined character patterns are also available using a
8-dot characters, up to four fonts may be redefined.
5 bits, for controlling the display of a maximum of 40 icons and marks.
00H–0BH
1st Line
(SN = 000)
00H–0BH
10H–1BH
00H–0BH
10H–1BH
20H–2BH
00H–0BH
10H–1BH
20H–2BH
30H–3BH
5 bits allows the user to redefine the character patterns for user
8-dot character patterns from 8-bit character codes (Table 5).
10H–1BH
2nd Line
(SN = 001)
10H–1BH
20H–2BH
10H–1BH
20H–2BH
30H–3BH
10H–1BH
20H–2BH
30H–3BH
40H–4BH
Display-Start Lines
3rd Line
(SN = 010)
20H–2BH
20H–2BH
30H–3BH
20H–2BH
30H–3BH
40H–4BH
20H–2BH
30H–3BH
40H–4BH
00H–0BH
30H–3BH
4th Line
(SN = 011)
30H–3BH
40H–4BH
30H–3BH
40H–4BH
00H–0BH
30H–3BH
40H–4BH
00H–0BH
10H–1BH
HD66717
5th Line
(SN = 100)
40H–4BH
40H–4BH
00H–0BH
40H–4BH
00H–0BH
10H–1BH
40H–4BH
00H–0BH
10H–1BH
20H–2BH
465