hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 30

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

Table 8
Notes: 1. Data set to SEGRAM is output when COM0 and COM17 are selected, as for a 1-line display,
2. S1 to S96 are pin numbers of the segment output driver. S1 is positioned to the left of the
3. After S80 output at 5-dot font and S96 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
5. When the BE bit of the function set register is 1, pattern blinking of the lower six bits is
6. Bit 5 (D5) is invalid for a 5-dot font width.
7. Set bits in the SEGRAM data correspond to display selection, and zeros to non-selection.
and output when COM0 and COM33 are selected, as for a 2-line or a 4-line display. COM0
and COM17 for a 1-line display and COM0 and COM33 for a 2-line or a 4-line display are the
same signals.
display. When the HD66712 is used by one chip, segments from S1 to S60 are displayed. An
extension driver displays the segments after S61.
segment. For a 6-dot character width, the lower six bits (D5 to D0) are the display information
for each segment.
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.
Relationship between SEGRAM Addresses and Display Patterns
A3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
SEGRAM
address
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Blinking control
D7 D6 D5 D4 D3 D2 D1 D0
B1 B0 *
B1 B0
B1 B0
B1 B0
B1 B0
B1 B0
B1 B0
B1
B1
B1
B1
B1
B1
B1
B1
B1
B0
B0
B0
B0
B0
B0
B0
B0
B0
a) 5-dot font width
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
S11 S12 S13 S14 S15
S16 S17 S18 S19 S20
S21 S22 S23 S24 S25
S26 S27 S28 S29 S30
S31 S32 S33 S34 S35
S36
S41
S46
S51
S56
S61
S66
S71
S76
S1 S2 S3 S4 S5
S6 S7 S8 S9 S10
S37
S42
S47
S52
S57
S62
S67
S72
S77
Pattern on/off
S38
S43
S48
S53
S58
S63
S68
S73
S78
S39
S44
S49
S54
S59
S64
S69
S74
S79
SEGRAM data
S40
S45
S50
S55
S60
S65
S70
S75
S80
Blinking control
D7 D6 D5 D4 D3 D2 D1 D0
B1 B0 S1 S2 S3 S4 S5 S6
B1 B0
B1 B0
B1 B0
B1 B0
B1 B0
B1 B0
B1
B1
B1
B1
B1
B1
B1
B1
B1
B0
B0
B0
B0
B0
B0
B0
B0
B0
b) 6-dot font width
S13 S14 S15 S16 S17 S18
S19 S20 S21 S22 S23 S24
S25 S26 S27 S28 S29 S30
S31 S32 S33 S34 S35 S36
S37 S38 S39 S40 S41 S42
S43
S49
S55
S61
S67
S73
S79
S85
S91
S7 S8 S9 S10 S11 S12
S44
S50
S56
S62
S68
S74
S80
S86
S92
Pattern on/off
S45
S51
S57
S63
S69
S75
S81
S87
S93
S46
S52
S58
S64
S70
S76
S82
S88
S94
S47
S53
S59
S65
S71
S77
S83
S89
S95
S48
S54
S60
S66
S72
S78
S84
S90
S96
HD66712U
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