Fibocom L610 Series - Page 17

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FIBOCOM L610 Series Hardware Guide Page 17 of 59
Pin
Pin Name
I/O
Level
Reset
Value
Description
12
DBG_TXD
O
VOLmax=0.45V
VOHmin=1.35V
-
DEBUG serial port Transmit
Left floating when not in use
13
USIM_PRESENCE
I
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
L
USIM hot plug detection; no need to
connect 10k resistance to Ground in
series; software shutdown detection
function
14
USIM_VDD
PO
For 1.8V USIM:
Vmax=1.9V
Vmin=1.7V
For 3.0V USIM:
Vmax=3.05V
Vmin=2.7V
I/Omax=50mA
-
USIM power supply
15
USIM_DATA
I/O
For 1.8V USIM:
VILmax=0.6V
VIHmin=1.2V
VOLmax=0.45V
VOHmin=1.35V
For 3.0V USIM:
VILmax=1.0V
VIHmin=1.95V
VOLmax=0.45V
VOHmin=2.55V
-
USIM data signal cable
16
USIM_CLK
O
For 1.8V USIM:
VOLmax=0.45V
VOHmin=1.35V
For3.0V USIM:
VOLmax=0.45V
VOHmin=2.55V
-
USIM clock signal cable
17
USIM_RST
O
For 1.8V USIM:
VOLmax=0.45V
-
USIM reset signal cable