Hardware Development Guide of Module Product
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31
MF206A
3.5
(U)SIM Card Interface
3.5.1
Description of PINs
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 3-6.;
Table 3–6 Definition & Description of (U)SIM Card Signal Group
PIN No.
Pin Name
Signal Definition
Signal Description
48
VREG_RSIM
Power supply for USIM card.
Output range: 1.5-3.0V
49
UIM_RST
Reset signal of USIM card.
UIM card reset signal, output
from the module
50
UIM_DATA
Data signal of USIM card.
--
51
UIM_CLK
Clock signal of USIM card.
--
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 0.1
μ
F and 33pF capacitor between
VREG_RSIM and GND, and cascade a 33pF capacitor between UIM_CLK, UIM_RST and GND, to filter out
the interference by RF signals. It is recommended to cascade a 20ohm resistance on UIM_DATA cable.