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FIBOCOM FG621-LA Series Hardware Guide
Page 31 of 57
5.3 (U)SIM Card Interface
FG621-LA series module has built-in (U)SIM card interface, and supports 1.8V and 3.0V (U)SIM card.
5.3.1 (U)SIM Pin Definition
(U) SIM pin definition is shown in the following table:
Table 5-6 (U)SIM pin definition
Pin Name
I/O
Pin#
Description
USIM_DET
DI
25
Detect (U)SIM card for Hot-plug
USIM_VDD
PO
26
(U)SIM Power
USIM_DATA
IO
29
(U)SIM data signal
USIM_CLK
DO
27
(U)SIM clock signal
USIM_RST
DO
28
(U)SIM reset signal
5.3.2 (U)SIM Interface Circuit
5.3.2.1 (U)SIM Card Connector with Card Detection Signal
(U)SIM card connector should be selected for (U)SIM design. It is recommended to use (U)SIM card
connector with hot plug detection function (Recommended model: SIM016-8P-220P).
