Motorola CP160 Detailed Service Manual page 43

Troubleshooting Tables for Board and IC Signals (includes Controller, DC Regulation and Audio)
IC Designator
U401
Microprocessor
Pin Pin Function
38 PH7_CSPROG
39 VDDL
40 VSSL
41 PH6_CSGP2
42 PH5_CSGP1
43 PH4_CSIO
44 PH3_PW4
45 PH2_PW3
46 PH1_PW2
47 PH0_PW1
48 XIRQ
49 PI7
50 PI6
51 PI5
52 PI4
53 PI3
54 PI2
55 PI1
56 PI0
57 MODB_VSTBY
58 MODA_LIR
59 AVDD
60 PE7_AN7
61 PE6_AN6
62 PE5_AN5
63 PE4_AN4
64 PE3_AN3
65 PE2_AN2
66 PE1_AN1
67 PE0_AN0
68 VRL
69 VRH
70 AVSS
71 PJ0_CSGP3
72 PJ1_CSGP4
73 PJ2
74 PJ3
DC Voltage Comments (Condition)
3.05
3.23
GND
3.23
3.23
0
3.21 On/off control output
0
3.00
3.23 Synth chip select
3.00
1.48 RX enable
0.01 TX enable
3.23
0 Green LED enable
0 Red LED enable
0
0
2.98 Lock detect from U201-4
3.22 Boot mode enable
3.12
3.23
3.20
3.20
2.91 VOX threshold detect
0.73 RSSI input
0.14
1.62
0 - 3.3 V Volume control wiper
2.48 33% of battery voltage
0
3.20
GND
3.23 Side PTT button
0 External MIC PTT
3.23
3.23
2-3