Service manual

2-22 Installation: Electrical Connections
16 GND
17 GND
18 GND
19 GND
20 Fused 14.2VDC 1 Amp max
21 GPIO_8 I/O J3-C29, J4-A12 Output Logic Low: 0.5 VDC max
Output Logic High: Open Collector with 10K pull-up to 5 V
Input Logic Low: 0 to 0.8 VDC
Input Logic High: 3.0 to 14 VDC
22 Emph Tx Audio I J3-A29, J4-B12 Emphasized Transmit Audio – Nominal input level is 80 mVrms
for 60% deviation with scaling factor set to 100%. 600 Ω input
impedance.
23 GPI_4 I/O J3-A31, J4-A10 Output Logic Low: 0.5 VDC max
Output Logic High: Open Collector with 10K pull-up to 5 V
Input Logic Low: 0 to 0.8 VDC
Input Logic High: 3.0 to 14 VDC
24 GPIO_5 I/O J3-C31, J4-B10 Output Logic Low: 0.5 VDC max
Output Logic High: Open Collector with 10K pull-up to 5 V
Input Logic Low: 0 to 0.8 VDC
Input Logic High: 3.0 to 14 VDC
25 GPIO_6 I/O J3-A32, J4-B19 Output Logic Low: 0.5 VDC max
Output Logic High: Open Collector with 10K pull-up to 5 V
Input Logic Low: 0 to 0.8 VDC
Input Logic High: 3.0 to 14 VDC
Table 2-5. J7 Auxiliary System Connector Pins (Continued)
Pin #
Pin
Assignment
Input/
Output
To/From Signal Characteristics