M20 Hardware Design
5 Electrical, reliability and radio characteristics
5.1 PIN assignment of the module
Table31:PINassignment
PIN NO. PIN NAME I/O PIN NO. PIN NAME I/O
1 SIM_CLK O 50 AGND
2 SIM_VDD O 49 SPK2P O
3 SIM_DATA I/O 48 SPK1P O
4 SIM_RST O 47 SPK1N O
5 SIM_PRESENCE I 46 MIC2N I
6 SIM_GND 45 MIC2P I
7 RXDDAI I/O 44 MIC1P I
8 TFSDAI O 43 MIC1N I
9 SCLK O 42 AGND
10 TXDDAI O 41 PWRKEY I
11 Reserve O 40 EMERG_OFF I
12 ADC1 I 39 DCD0 O
13 NETLIGHT I/O 38 CTS1 O
14 TXD1 O 37 CTS0 O
15 TXD0 O 36 RTS1 I
16 RXD1 I 35 DTR0 I
17 RXD0 I 34 RTS0 I
18 VRTC I/O 33 Reserve
19 VCHG I 32 RI0 O
20 Reserve 31 VDD_EXT O
21 GND 30 VBAT I
22 GND 29 VBAT I
23 GND 28 VBAT I
24 GND 27 VBAT I
25 GND
26 VBAT I
Note: Please keep all reserved pins open.
M20_HD_V1.01 - 65 -
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