Motorola Commercial Series Service Information - Page 16
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IC Designator
U401
Microprocessor
Pin
Pin Function
1
PD4_SCK serial clock input
2
PD5_SS
3
PD6_VLIN
4
PG7_R_W
5
PG6_AS
6
PG0_XA13
7
PB7_ADDR15
8
PB6_ADDR14
9
PB3_ADDR11
10
PB1_ADDR9
11
PB2_ADDR10
12
VDD
13
VSS
14
PBO_ADDR8
15
PB5_ADDR13
16
PG1_XA14
17
PG4_XA17
18
PG5_XA18
19
PG3_XA16
20
PG2_XA15
21
PB4_ADDR12
22
PF7_ADDR7
23
PF6_ADDR6
24
PF5_ADDR5
25
PF4_ADDR4
26
PF3_ADDR3
27
PF2_ADDR2
28
PF1_ADDR1
29
PFO_ADDR0
30
PC0_DATA0
31
PC1_DATA1
32
PC2_DATA2
33
PC3_DATA3
34
PC4_DATA4
35
PC5_DATA5
36
PC6_DATA6
37
PC7_DATA7
TROUBLESHOOTING TABLES
DC Voltage
Comments (Condition)
0
3.23
ASFIC chip select
3.23
EEPROM chip select
3.21
3.23
3.23
0.026
0.028
3.06
3.05
0.16
3.23
GND
3.05
0.13
0.20
3.17
0
3.21
0.30
0.22
3.03
3.08
3.06
0.16
0.26
3.06
3.06
3.05
0.69
0.96
1.10
0.81
0.62
0.68
0.67
0.73