Hardware Development Guide of Module Product
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17
3.5
(U)SIM Card Interface
3.5.1
Description of PINs
ZM5202 WCDMA module baseband processor integrates the (U)SIM card interface
in compliance with ISO 7816-3 standards, and supports to automatically detect
3.0V/1.8V (U)SIM cards. The signals on SIM card interface is as shown in Table
3-5.
Table 3-5 Definition & Description of (U)SIM Card Signal Group
PIN
Protocol
Signal
Signal
Definition
Signal Description
48
VREG_RSIM SIM card power Output range: 1.5-3.0V
49
UIM_RST
SIM card reset
PIN
--
50
UIM_DATA
SIM card data
PIN
--
51
UIM_CLK
SIM card clock
PIN
--
52
UIM_DP
Data cable
USIM card data signal,
applied on a large-capacity
SIM card
53
UIM_DM
Data cable
USIM card data signal,
applied on a large-capacity
SIM card
3.5.2
Electric Feature
On the line close to the (U)SIM card console, be sure to add the ESD circuit
protection during the design.
To comply with the requirements of 3GPP TS 51.010-1 and EMC authentication, it
is recommended to place (U)SIM card console close to the (U)SIM card interface, to
prevent the wiring from being too long, which might seriously distort the waveform
and thus affect the signal integrity. It is recommended to make the grounding
protection for UIM_CLK and UIM_DATA signal wiring. Cascade one 0.1uF and
33pF capacitor between VREG_RSIM and GND, and cascade a 33pF capacitor
