NTE6821 データシートの表示（PDF） - NTE Electronics
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NTE6821 Datasheet PDF : 5 Pages
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IRQA 38
D0 33
D1 32
D2 31
D3 30
D4 29
D5 28
D6 27
D7 26
VCC = PIN20
VSS = PIN1
CS0 22
CS1 24
CS2 23
RS0 36
RS1 35
R/W 21
Enable 25
Reset 34
IRQB 37
Expanded Block Diagram
Data Bus
Buffers
(DBB)
Bus Input
Register
(BIR)
Control
Register A
(CRA)
Output Bus
Output
Register A
(ORA)
Interrupt Status
Control A
Data Direction
Register A
(DDRA)
Peripheral
Interface
A
Chip
Select
and
R/W
Control
Output
Register B
(ORB)
Peripheral
Interface
B
Control
Register B
(CRB)
Data Direction
Register B
(DDRB)
Interrupt Status
Control B
40 CA1
39 CA2
2 PA0
3 PA1
4 PA2
5 PA3
6 PA4
7 PA5
8 PA6
9 PA7
10 PB0
11 PB1
12 PB2
13 PB3
14 PB4
15 PB5
16 PB6
17 PB7
18 CB1
19 CB2
Pin Connection Diagram
VSS 1
PA0 2
PA1 3
PA2 4
PA3 5
PA4 6
PA5 7
PA6 8
PA7 9
PB0 10
PB1 11
PB2 12
PB3 13
PB4 14
PB5 15
PB6 16
PB7 17
CB1 18
CB2 19
VCC 20
40 CA1
39 CA2
38 IRQA
37 IRQB
36 RS0
35 RS1
34 RESET
33 D0
32 D1
31 D2
30 D3
29 D4
28 D5
27 D6
26 D7
25 E
24 CS1
23 CS2
22 CS0
21 R/W
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