HD66717 Datasheet, PDF (14/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)

HD66717
Table 4 Display-Line Modes, Display-Start Line, and DDRAM Addresses
Display-Start Lines
Display- Duty
1st Line 2nd Line 3rd Line 4th Line 5th Line
Line Mode Ratio Common Pins (SN = 000) (SN = 001) (SN = 010) (SN = 011) (SN = 100)
1-line
1/10 COM1–COM8 00H–0BH 10H–1BH 20H–2BH 30H–3BH 40H–4BH
(NL = 00)
2-line
1/18 COM1–COM8 00H–0BH 10H–1BH 20H–2BH 30H–3BH 40H–4BH
(NL = 01)
COM9–COM16 10H–1BH 20H–2BH 30H–3BH 40H–4BH 00H–0BH
3-line
(NL = 10)
1/26 COM1–COM8 00H–0BH
COM9–COM16 10H–1BH
COM17–COM24 20H–2BH
10H–1BH
20H–2BH
30H–3BH
20H–2BH
30H–3BH
40H–4BH
30H–3BH
40H–4BH
00H–0BH
40H–4BH
00H–0BH
10H–1BH
4-line
(NL = 11)
1/34 COM1–COM8 00H–0BH
COM9–COM16 10H–1BH
COM17–COM24 20H–2BH
COM25–COM32 30H–3BH
10H–1BH
20H–2BH
30H–3BH
40H–4BH
20H–2BH
30H–3BH
40H–4BH
00H–0BH
30H–3BH
40H–4BH
00H–0BH
10H–1BH
40H–4BH
00H–0BH
10H–1BH
20H–2BH
Character Generator ROM (CGROM)
The character generator ROM generates 5 × 8-dot character patterns from 8-bit character codes (Table 5).
It can generate 240 5 × 8-dot character patterns. User-defined character patterns are also available using a
mask-programmed ROM (see the Modifying Character Patterns section.)
Character Generator RAM (CGRAM)
The character generator RAM of 32 × 5 bits allows the user to redefine the character patterns for user
fonts. In the case of 5 × 8-dot characters, up to four fonts may be redefined.
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 × 5 bits, for controlling the display of a maximum of 40 icons and marks.
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.
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