Usim Card Interface; Usim Card Application - Quectel UC20 Manual
Umts/hspa module series
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Also See for UC20:
- Hardware design (83 pages) ,
- User manual (33 pages) ,
- Application note (30 pages)
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3.11. USIM Card Interface
3.11.1. USIM Card Application
The USIM card interface circuitry meets ETSI and IMT-2000 SIM interface requirements. Both 1.8V and
3.0V USIM cards are supported.
Table 12: Pin Definition of the USIM Interface
Pin Name
Pin No.
USIM_VDD
14
USIM_DATA
15
USIM_CLK
16
USIM_RST
17
USIM_PRES
13
ENCE
USIM_GND
10
The following figure shows the reference design of the 8-pin USIM card.
USIM_GND
USIM_VDD
USIM_RST
Module
USIM_CLK
USIM_PRESENCE
USIM_DATA
UC20_Hardware_Design
I/O
Description
PO
Power supply for USIM card.
IO
Data signal of USIM card.
DO
Clock signal of USIM card.
DO
Reset signal of USIM card.
DI
USIM card insertion detection.
Specified ground for USIM card.
VDD_EXT
USIM_VDD
51K
22R
22R
22R
33pF 33pF 33pF
Figure 22: Reference Circuit of the 8 Pin USIM Card
Confidential / Released
Comment
Either 1.8V or 3.0V is supported by
the module automatically.
Pull-up to USIM_VDD with 15k
resistor internally.
1.8V power domain.
15K
100nF
GND
GND
UMTS/HSPA Module Series
UC20 Hardware Design
USIM Connector
VCC
GND
RST
VPP
IO
CLK
ESDA6V8AV6
GND
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