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UPD16681 Datasheet(PDF) 19 Page - NEC

Part # UPD16681
Description  LCD CONTROLLER/DRIVER FOR DOT MATRIX DISPLAY OF JIS LEVEL 1 AND JIS LEVEL 2 KANJI SETS
PDF  56 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD16681 Datasheet(HTML) 19 Page - NEC

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Data Sheet S13104EJ5V0DS00
19
µµµµPD16681
6.6 Pictograph Blink Data RAM (PBRAM)
PBRAM is the RAM that contains pictograph blink data that has been assigned to PCOM1 and PCOM2. A data
value of “1” is written to the address of the pictograph to be set for a blink display.
After data is written, the address counter is automatically incremented (by one), and the value after 0FH is 00H.
The correspondence between output from various segments and PBRAM addresses is shown below.
PCOM1,PCOM2
Address
Segment Output No.
b7
b6
b5
b4
b3
b2
b1
b0
00H
X
X
65
4321
01H
X
X
12
11
10
9
8
7
02H
X
X
18
17
16
15
14
13
03H
X
X
24
23
22
21
20
19
04H
X
X
30
29
28
27
26
25
05H
X
X
36
35
34
33
32
31
06H
X
X
42
41
40
39
38
37
07H
X
X
48
47
46
45
44
43
08H
X
X
54
53
52
51
50
49
09H
X
X
60
59
58
57
56
55
0AH
X
X
6665
64636261
0BH
X
X
7271
70696867
0CH
X
X
7877
76757473
0DH
X
X
8483
82818079
0EH
X
X
9089
88878685
0FH
X
X
9695
94939291
Remark
X : Don’t care
6.7 Relation between Addresses and Various ROM and RAM Devices
The
µPD16681 assigned FCGROM addresses as shown below to HCGROM, CGRAM, and user-defined ROM.
Type
No. of Characters
Address Range
JIS kanji
6355
Same as kanji ROM IC
Non-JIS kanji
453
Same as kanji ROM IC
Half width alphanumeric
characters
192
Uses addresses 0080H to 039FH in the kanji ROM IC
User defined
256
Uses addresses 1000H to 101FH in the kanji ROM IC
CGRAM
8
Uses addresses 0000H to 0007H in the kanji ROM IC



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