User's Manual

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H380-GL Hardware User Manual Page
16
of
47
Pin
Pin Name
I/O
Reset Value
Pin Description
Type
37
NC
NC
38
NC
NC
39
GND
GND
Power
supply
40
GNSS_SCL
O
PU
I2C serial data signal clock,
internal 4.7KΩ pull-up resistance
(not supported)
CMOS 1.8V
41
NC
NC
42
GNSS_SDA
I/O
PU
I2C serial data signal data,
internal 4.7KΩ pull-up resistance
(not supported)
CMOS 1.8V
43
NC
NC
44
GNSS_IRQ
I
PU
Module system switch input
interrupt signal, Internal pull up
CMOS 1.8V
45
GND
GND
Power
supply
46
SYSCLK
O
L
26MHz clock output
1.8V
47
NC
NC
48
TX_BLANKING
O
L
GSM TDMA Timer output signal,
external GPS control signal
CMOS 1.8V
49
NC
NC
50
NC
NC
51
GND
GND
Power
supply
52
NC
NC
53
NC
NC
54
NC
NC
55
NC
NC
56
NC
NC