HYT TC-508 Service Manual page 18

91 SW_P0
92 SW_P1
93 RESET
94 Vssa
95 Vdda
96 BG_REF
97 MIC_IN
98 DEMODE
99 MODOUT
100 NC
Reserve O
TX_CTRL O
RESET I
GND S
VCC（3.0V） S
O
MIC_IN I
DEMODE I
MODOUT O
/ /
Reserved
TX power control pin (H: Transmit)
Reset input pin
Power ground for analog circuit
Power supply for analog circuit
Reference voltage output pin
Microphone input pin
Baseband signal input pin (audio and CTCSS)
Baseband signal output pin (audio and CTCSS)
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TC-508 Service Manual