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3.1. Pin Assignment
The following figure shows the pin assignment of BG770A-GL.
1
GPIO1
33
GPIO4
2
PCM_DIN
34
PCM_DOUT
3
PCM_CLK
35
PCM_SYNC
4
RESERVED
36
RESERVED
5
I2C_SDA
37
I2C_SCL
6
MAIN_RXD
38
MAIN_RTS
7
MAIN_TXD
39
MAIN_CTS
8
GPIO2
40
GPIO5
9
GPIO3
POWER
USIM
BG770A-GL_Hardware_Design
32
31
30
GND
GND
ANT_GNSS
56
GND
GND
57
GPIO6
73
GND
58
85
GND
GND
74
GND
59
86
AUX_RTS
GND
75
GND
60
87
DBG_TXD
RESERVED
76
MAIN_RI
61
88
DBG_RXD
GND
77
AP_READY
62
89
MAIN_DTR
GND
78
STATUS
63
GPIO7
41
USBPHY_
W_DSIABLE#
3P3
10
11
12
USB_DM
USB_DP
USB_VBUS
USB
ANT
PCM
Figure 2: Pin Assignment (Top View)
29
28
27
RESERVED
GND
GND
55
54
53
GND
GND
72
PON_TRIG
84
GND
94
GRFC2
83
GRFC1
93
AUX_TXD
82
AUX_RXD
92
DBG_RTS
81
RESERVED
91
RESERVED
80
RESERVED
90
MAIN_DCD
79
NET_
STATUS
64
USBPHY_
3P3_EN
42
43
44
GND
USIM_DET
13
14
15
USIM_CLK
USIM_DATA
USIM_RST
GPIO
RESERVED
I2C
UART
LPWA Module Series
BG770A-GL Hardware Design
26
ANT_MAIN
25
GND
52
GND
71
24
GND
RESERVED
51
DBG_CTS
70
23
AUX_CTS
GND
50
RESERVED
69
22
RESERVED
GND
49
RESERVED
68
21
RESERVED
VDD_EXT
48
RESERVED
67
20
DBG_RSTN
VBAT_RF
47
GND
66
19
GND
VBAT_BB
46
PWRKEY
65
18
USIM_GND
ADC1
45
RESET_N
17
ADC0
16
USIM_VDD
GND
Control&Indicator
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