HD66710 Datasheet, PDF (23/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

Table 6 Relationships between SEGRAM Addresses and Display Patterns
HD66710
SEGRAM
address
A2 A1 A0
000
001
010
011
100
101
110
111
SEGRAM data
a) 5-dot font width
b) 6-dot font width
D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
B1 B0 * S1 S2 S3 S4 S5 B1 B0 S1 S2 S3 S4 S5 S6
B1 B0 * S6 S7 S8 S9 S10 B1 B0 S7 S8 S9 S10 S11 S12
B1 B0 * S11 S12 S13 S14 S15 B1 B0 S13 S14 S15 S16 S17 S18
B1 B0 * S16 S17 S18 S19 S20 B1 B0 S19 S20 S21 S22 S23 S24
B1 B0 * S21 S22 S23 S24 S25 B1 B0 S25 S26 S27 S28 S29 S30
B1 B0 * S26 S27 S28 S29 S30 B1 B0 S31 S32 S33 S34 S35 S36
B1 B0 * S31 S32 S33 S34 S35 B1 B0 S37 S38 S39 S40 S41 S42
B1 B0 * S36 S37 S38 S39 S40 B1 B0 S43 S44 S45 S46 S47 S48
Blinking control
Pattern on/off
Blinking control
Pattern on/off
Notes: 1. Data set to SEGRAM is output when COM17 is selected, as for a 1-line display, and output
when COM33 is selected, as for a 2-line or a 4-line display.
2. S1 to S48 are pin numbers of the segment output driver.
S1 is positioned to the left of the monitor.
S37 to S48 are extension driver outputs for a 6-dot character width.
3. After S40 output at 5-dot font and S48 output at 6-dot font, S1 output is repeated again.
4. As for a 5-dot font width, lower five bits (D4 to D0) are display on.off information of each
segment. For a 6-dot character width, the lower six bits (D5 to D0) are the display information
for each segment.
5. When the BE bit of the function set register is 1, pattern blinking of the lower six bits is
controlled using the upper two bits (bits 7 and 6) in SEGRAM.
When bit 7 is 1, only a bit set to “1” of the lower six bits is blinked on the display.
When bit 6 is 1, only a bit 4 pattern can be blinked as for a 5-dot font width, and only a bit 5
pattern can be blinked as for 6-dot font width.
6. Bit 5 (D5) is invalid for a 5-dot font width.
7. Set bits in the CGRAM data correspond to display selection, and zeros to non-selection.
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