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L816-AM Hardware User Manual
Page 14 of 42
3.1.2 Pin Definition
The L816-AM pin definition is as follows:
Pin
Pin Name
I/O
Reset
Value
Pin Description
Type
USB2.0
13
USB_DP
I/O
T
USB Data Positive
0.3---3V
14
USB_DN
I/O
T
USB Data Negative
0.3---3V
15
VBUS
PI
USB VBUS Supply
2.0---5.25V
SIM
17
SIM1_DATA
I/O
L
USIM data, internal 4.7KΩ pull-up
1.8V/3V
18
SIM1_RST
O
L
USIM reset
1.8V/3V
19
SIM1_CLK
O
L
USIM clock
1.8V/3V
20
VSIM1
PO
USIM power supply
1.8V/3V
26
SIM1_CD
I
USIM card detection with 390KΩ pull-
up, active high
1.8V
EINT
31
Wakeup_Modem
I
PD
Reserved
CMOS 1.8V
40
W_Disable#
I
PD
Disable WWAN
CMOS 1.8V
27
BodySar
I
PD
Body SAR detection
CMOS 1.8V
GPIO
28
FW_Ready
O
PD
FW_Ready output
CMOS 1.8V
29
SMS_Ready
O
PD
SMS_Ready output
CMOS 1.8V
30
USB_En/Disable
O
PD
Enable_Disable-USB Signal Output
CMOS 1.8V
33
PA_Blanking
O
PD
PA_Blanking output
CMOS 1.8V
42
GPIO_Modem
I/O
PD
Reserved
CMOS 1.8V
39
Wakeup_Host
O
PD
Wakeup_Host output
ANT
61
Main_ANT
I/O
Main antenna
68
DIV_ANT
I
Diversity antenna
ANT Tunable
