M20 EVB User Guide
3.8.3 J3 test points
Figure 15: J3 test points
Table 12: Pins of J3
Pin Signal I/O Description
1 RXDDAI I Receive digital audio data
2 SIM_PRESENCE I SIM card detection
3 TXDDAI O Transmit digital audio data
4 NETLIGHT O Network status indication
5 TFSDAI O Frame synchronization
6 Reserve
7 SCLK O Serial bit clock
8 ADC I ADC input
9 Reserve
10 VRTC I/O Module RTC
M20_EVB_UGD_V1.01 - 21 -
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