Esd Protection For The Usim Card Interface; Audio Interface - Huawei MU739 Hardware Manual

HUAWEI MU739 HSPA+ LGA Module
Hardware Guide

3.6.3 ESD Protection for the USIM Card Interface

It is recommended that you take electrostatic discharge (ESD) protection measures
near the USIM card socket. Figure 3-17 shows ESD protection circuit of the USIM
card, in which the transient voltage suppressor (TVS) diode is placed as close as
possible to the USIM card socket, and the GND pin of the ESD protection component
is well connected to the power GND pin that supplies power to the MU739 module.
Figure 3-17 ESD protection circuit on the USIM card

3.7 Audio Interface

I2S features:
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Table 3-8 I2S interface signals
Pin
No.
54
55
Issue 01 (2011-08-24)
Two supported modes: Normal mode and PCM mode
32-bit data path
Interface can operate in master and slave mode
Two independent 64 word data buffers for receiver and transmitter
Bi-directional transmission with independent receiver and transmitter
Two independent fractional dividers for bit clock generation for reception and
transmission in master mode
Adjustable audio sampling rate (48 KHz, 44.1 KHz, 32 KHz, 24 KHz, 22.05 KHz,
16 KHz, 12 KHz, 11.025 KHz and 8 KHz).
Pin Name
Normal MUX
I2S_CLK1 -
I2S_CLK0 PCM_CLK
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Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
I/ Description
O
O Serial clock
O Serial clock
DC Characteristics (V)
Min Typical Max
-0.3 1.8 2.1
-0.3 1.8 2.1
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