User Guide

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18
GM500-U1G_A
Hardware Development Guide
117
Turn On/Off
Pin Name Pin NO. I/O Description DC Characteristics Comment
POWER_ON 1 DI Turn on/off
module,level trigger
(active low)
V
IH
max = 2.1V
V
IH
min = 1.17V
V
IL
max = 0.63V
Pull-up to 0.8V internally, active low
PON_TRIG 66 DI Level high triggered
power on input
V
IH
max = 2.1V
V
IH
min = 1.17V
V
IL
max = 0.63V
RESET_N 2 DI Reset module V
IH
max = 2.1V
V
IH
min = 1.17V
V
IL
max = 0.63V
Active low
Status Indication
Pin Name Pin NO. I/O Description DC Characteristics Comment
ON_STATE 69 DO Module power on/off
status indicator
V
OH
min = 1.35V
V
OL
max = 0.45V
1.8V power domain
LED_MODE 70 DO Indicate the module
network registration
mode
V
OH
min = 1.35V
V
OL
max = 0.45V
1.8V power domain
USB Interface
Pin Name Pin NO. I/O Description DC Characteristics Comment
USB_DP 24 IO USB differential data
bus
Compliant with USB 2.0 standard
specification Require differential
impedance of 90Ω
USB_DM 23 IO
USB_VBUS 22 DI USB plug detect pin,
not USB power
USB plug detect
HSIC Interface
Pin Name Pin NO. I/O Description DC Characteristics Comment
USB_STROBE 25 IO HSIC strobe
InterChip USB(HSIC)
line impedance 50 ohm, isometric
constraint is less than 2 mm, line
length is less than 10 cm
USB_DATA 26 IO HSIC data
USIM Interface
Pin Name Pin NO. I/O Description DC Characteristics Comment
USIM1_VCC 40 PO Power supply for
USIM1 card
For 1.8V USIM:
Vmax = 1.9V
Vmin = 1.7V
For 3.0V USIM:
Vmax = 3.05V
Vmin = 2.7V
I
O
max = 50mA
Either 1.8V or 3V is supported by the
module automatically