Arcam DiVA AVR250 - Key Board U1002: AT89 S52; Main Board U101: AT89 S52

- 43 -
AVR250 SURROUND SOUND RECEIVER
P1.0
(T2)
VCC
P1
.1
(T2
EX)
P0
.0
(AD
0
)
P1
.2
ALE/PROG
(RD) P3.7
XT
AL
1
EA/VPP
(WR) P3.6
GND
(RXD) P3.0
P0.7 (AD7)
P2.6 (A14)
P0.6 (AD6)
P0.5 (AD5)
P0.4 (AD4)
P0.3 (AD3
)
P1.4
P0
.2
(AD2)
P1.3
P0.1
(AD1)
PSEN
XTAL2
(INT0) P3.2
(TXD) P3.1
(T1) P3.5
(INT1) P3.3
(T0) P3.4
P2.7 (A15)
(A11)
P2.3
(A12)
P
2
.4
(A
10)
P
2
.
2
(A9
)
P2
.1
(A8) P2.0
NC
23
1
RST
P1.7
P1.6
P1.5
INDEX
CORNER
NC
NC
P2.5 (A13)
34
NC
42
43
40
41
6
5
444
3
2
26
25
28
27
18
19
20 24
21
22
7
8
9
10
11
12
13
14
15
16
17 29
30
39
38
37
36
35
33
32
31
KEY BOARD
U1002: AT89S52
MAIN BOARD
U101: AT89S52