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CPU
VREF
U31
13
44
VREF
T2CLK/P2.3
12
42
ANGND
T2RST/P2.4
REDDC
6
33
ACH0/P0.0
P2.6/T2U-D
5
38
REDAC
ACH1/P0.1
P2.7/T2CAPT
IRDC
7
24
ACH2/P0.2
HSI0
IRAC
4
25
ACH3/P0.3
HSI1
RSENS
11
26
ACH4/P0.4
HSI2/HSO4
10
27
AMB_LIGHT
ACH5/P0.5
HSI3/HSO5
BAT_VOLT
8
28
ACH6/P0.6
HSO0
PR_TEMP
9
29
ACH7/P0.7
HSO1
PR_TACH
15
34
EXTINT/P2.2
HSO2
14
35
GND
HSO3
VCC
39
P2.5/PWM0
37
32
VPP
P1.7/HOLD
ALE
62
31
ALE/ADV
P1.6/HLDA
61
30
RD
RD
P1.5/BREQ
WR
40
23
WRL/WR
P1.4/PWM2
41
22
WRH/BHE
P1.3/PWM1
AD15
45
21
AD15/P4.7
P1.2
AD14
46
20
AD14/P4.6
P1.1
AD13
47
19
AD13/P4.5
P1.0
AD12
48
AD12/P4.4
AD11
49
10K
AD11/P4.3
AD10
50
43
AD10/P4.2
READY
AD9
51
63
AD9/P4.1
INST
52
64
AD8
AD8/P4.0
BUSWIDTH
AD7
53
3
AD7/P3.7
NMI
AD6
54
65
AD6/P3.6
CLKOUT
AD5
55
17
AD5/P3.5
RXD/P2.1
56
18
AD4
AD4/P3.4
TXD/P2.0
AD3
57
2
AD3/P3.3
EA
AD2
58
16
AD2/P3.2
RESET
AD1
59
66
AD1/P3.1
XTAL2
60
67
AD0
AD0/P3.0
XTAL1
80C196KC
C88
22PF
Y2
C89
10MHz
22PF
PR_HEAD1
PR_HEAD2
REDLED/AV
/ZERO
PHOTOI
DISP_PHASE
R137
PR_STROBE
SAMPRED
10K
OFF/ON
SAMPIR
PWM0
PR_PRESENT
IRLED/AV
PWR_DOWN
RST
PWM2
PWM1
DISP_LATCH
IR/RED
LEDDIS
R131
VCC
RAMEN
NMI
TP4
RXD
TXD
EA
RST
R76
R75
10K
10K
RESET GENERATION
VCC
VCC
C65
R72
100K
TP41
.1UF
RST
R73
15K
Q22
2N3904
R156
15K
Figure 9-34
CPU Circuit
TP42
CR10
1N914
9-51
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