Motorola CP040 - Page 53

Troubleshooting Tables for Board and IC Signals (includes Controller, DC Regulation and Audio) 2-7
U401
Microprocessor
38 PH7_CSPROG 3.05
39 VDDL 3.23
40 VSSL GND
41 PH6_CSGP2 3.23
42 PH5_CSGP1 3.23
43 PH4_CSIO 0
44 PH3_PW4 3.21 On/off control output
45 PH2_PW3 0
46 PH1_PW2 3.00
47 PH0_PW1 3.23 Synth chip select
48 XIRQ 3.00
49 PI7 1.48 RX enable
50 PI6 0.01 TX enable
51 PI5 3.23
52 PI4 0 Green LED enable
53 PI3 0 Red LED enable
54 PI2 0
55 PI1 0
56 PI0 2.98 Lock detect from U201-4
57 MODB_VSTBY 3.22 Boot mode enable
58 MODA_LIR 3.12
59 AVDD 3.23
60 PE7_AN7 3.20
61 PE6_AN6 3.20
62 PE5_AN5 2.91 VOX threshold detect
63 PE4_AN4 0.73 RSSI input
64 PE3_AN3 0.14
65 PE2_AN2 1.62
66 PE1_AN1 0 - 3.3 V Volume control wiper
67 PE0_AN0 2.48 33% of battery voltage
68 VRL 0
69 VRH 3.20
70 AVSS GND
71 PJ0_CSGP3 3.23 Side PTT button
72 PJ1_CSGP4 0 External MIC PTT
73 PJ2 3.23
74 PJ3 3.23
IC Designator Pin Pin Function DC Voltage Comments (Condition)