UMTS/HSPA Module Series
UC20 Hardware Design
UC20_Hardware_Design Confidential / Released 19 / 82
external circuit.
I
O
max = 20mA
external GPIO’s pull up
circuits.
VDD_2V85 34
PO
Provide 2.85V for
external circuit.
Vnorm = 2.85V
I
O
max = 100mA
Reserved for future
application. If unused,
keep it open.
GND
8,9,19,36,
46,48,50~
54,56,72,
85~112
Ground.
Turn On/Off
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
PWRKEY
21
DI
Turn on/off the
module.
R
PU
≈ 200kΩ
V
IH
max = 2.1V
V
IH
min = 1.3V
V
IL
max = 500mV
Pull-up to 1.8V
internally.
RESET_N
20
DI
Reset the module.
R
PU
≈ 200kΩ
V
IH
max = 2.1V
V
IH
min = 1.3V
V
IL
max = 500mV
Pull-up to 1.8V
internally. Active low.
If unused, keep it
open.
Status Indication
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
STATUS
61
OD
Indicate the module
operating status.
Require external
pull-up. If unused,
keep it open.
NET_MODE 5
DO
Indicate the module
network registration
mode.
V
OH
min = 1.35V
V
OL
max = 0.45V
1.8V power domain.
If unused, keep it
open.
NET_
STATUS
6
DO
Indicate the module
network activity
status.
V
OH
min = 1.35V
V
OL
max = 0.45V
1.8V power domain.
If unused, keep it
open.
SLEEP_IND
3
DO
Indicate the sleep
status.
V
OH
min = 1.35V
V
OL
max = 0.45V
1.8V power domain.
If unused, keep it
open.
USB Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
USB_VBUS
71
PI
USB detection.
Vmax = 5.25V
Vmin = 3.0V
Vnorm = 5.0V
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
