YUGE CLM920 NC3, Hardware Manual, Page: 24 / 80

CLM920_NC3_LTE Module hardware manual
Shanghai Yuge Information Technology co., LTD - 24 -
when not in use)
40 SPI_CLK DO SPI clock
Reuse I2S_SCLK (keep it
floating when not in use)
MCLK
Pin Pin definition IO Functional description Remarks
116 MCLK DO 12.288M clock output Keep empty when not in use
ADC interface
Pin Pin definition IO Functional description Remarks
44 ADC1 AI
General analog to digital
conversion
Keep empty when not in use
45 ADC0 AI
General analog to digital
conversion
Keep empty when not in use
RF interface
Pin Pin definition IO Functional description Remarks
35 ANT_DIV AI Diversity antenna 50
Ω
characteristic impedance
(keep empty when not in use)
47 ANT_GNSS AI GNSS antenna 50
Ω
characteristic impedance
(keep empty when not in use)
49 ANT_MAIN IO Main antenna 50
Ω
characteristic impedance
RESERVE pin
Pin number Module pin definition Description Remarks
18
，
23
，
28
，
29
，
30
，
31
，
32
，
33
，
34
，
37
，
38
，
39
，
40
，
43
，
55
，
73
，
74
，
75
，
76
，
77
，
78
，
79
，
80
，
81
，
82
，
83
，
84
，
113~144
RESERVE Reserve the
pin, please
keep the
circuit open Please stay
vacant

The module typically has an IO port level of 1.8V (in addition to the SIM, the SIM card
port level supports 1.8V and 3.0V).