Hardware Design

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SIM8200EA-M2 card Hardware Design _V1.01 28 2019-06-27
MODULE
UIM-PWR
UIM-CLK
UIM-DATA
UIM-RESET
SIM Detect
PRESENCE
100nF
MOLEX
-
91228
UIM Card
VCC
GND
RST
VPP
CLK I/O
22pF
(NC)
TVS1
Deserved
22R
0R
22R
22R
22pF
(NC)
22pF
(NC)
Figure 14: UIM interface reference circuit with UIM_DET
If the UIM card detection function is not used, user can keep the SIM Detect pin open.
SIM card circuit is susceptible, the interference may cause the SIM card failures or some other
situations, so it is strongly recommended to follow these guidelines while designing:
 Make sure that the SIM card holder should be far away from the antenna while in PCB
layout.
 SIM traces should keep away from RF lines, VBAT and high-speed signal lines.
 The traces should be as short as possible.
 Keep SIM holder’s GND connect to main ground directly.
 Shielding the SIM card signal by ground.
 Recommended to place a 0.1～1uF capacitor on UIM-PWR line and keep close to the
holder.
 The rise/fall time of UIM-CLK should not be more than 40ns.
 Add some TVS and the parasitic capacitance should not exceed 60pF.
3.10 I2S Interface
Module provides an I2S interface for external codec, which comply with the requirements in the
Phillips I2S Bus Specifications
Table 13: I2S format
Note: For more details about I2S AT commands, please refer to document [1]
. in the appendix.
Characteristics Specification
Line Interface Format
Linear(Fixed)
Data length
16bits(Fixed)
I2S Clock/Sync Source Master Mode(Fixed)
I2S Clock Rate
1.536 MHz (Default)
I2S MCLK rate
12.288MHz (Default)
Data Ordering MSB
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