USIM1_VDD
USIM1_DATA
USIM1_CLK
USIM1_RST
USIM1_DET
USIM2_VDD
USIM2_DATA
USIM2_CLK
USIM2_RST
USIM2_DET
VDD
DAT
CLK
RST
VPP
CD
22R
0.1uF
Module
Card connector
22R
1K
47K
47K
22R
20K
33pF
NC
NC
NC
VDD
DAT
CLK
RST
VPP
CD
0.1uF
33pF
NC
NC
NC
22R
22R
1K
22R
20K
Card connector
VDD-EXT-1V8
GND
GND
Figure 12. (U)SIM card slot with card detection signal
5.4.3. (U)SIM Card Hot Plug
The FG101-EAU series module supports the (U)SIM card hot plug function. The module
detects the status of the USIM1_DET/USIM2_DET pin to determine whether a (U)SIM card
is inserted or removed.
USIM1_DET/USIM2_DET is active high by default (if the card is at high level, the card is
inserted; otherwise, the card is removed). The hot plug detection can be
enabled/disabled by the AT command as follows.
Table 19. (U)SIM card hot plug function configuration
AT Command
Function
Remark
AT+MSMPD=1
(U)SIM card hot plug detection is
enabled
Default setting
5. Functional Interface
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