Interface Definition - Hytera MD78X Service Manual

Service Manual

7. Interface Definition

J404: to front panel jack
Pin No.
1 INT_MIC
2 MIC_GROUND
3 ACC_IO1
4 USB_VBUS
5 HOOK
6 PTT
7 USB_D-
8 USB_D+
9 ACC_IO2
10 UART2_RXD_A
11 UART2_TXD_B
12 HANDSET_AUDIO
13 SPKR1+
14 SPKR1-
15 5VD
16 PRST
17 KB_C0
18 KB_C1
19 KB_C2
20 KB_C3
21 KB_R0
22 KB_R1
Name
Audio input
Audio input ground
Accessory identifier pin 1
USB power supply
HOOK
PTT
USB data cable D-
USB data cable D+
Accessory identifier pin 2
Volume control port
/
Audio signal output by accessory
Speaker audio signal cable+
Speaker audio signal cable-
Power Supply
Reset signal
Matrix keyboard
Function
23
Interface Definition