Quectel EC2 Series User Manual

LTE Module Series
EM05 Hardware Design
EM05_Hardware_Design Confidential / Released 35 / 59
The following figure shows a reference design of PCM interface with external codec IC.
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
I2C_SCL
I2C_SDA
Module
1.8V
NM
BCLK
LRCK
DAC
ADC
SCL
SDA
BIAS
MICBIAS
INP
INN
LOUTP
LOUTN
Codec
NM
Figure 22: Reference Circuit of PCM Application with Audio Codec
1. “*” means under development.
2. It is recommended to reserve a RC (R=22Ω, C=22pF) circuit on the PCM lines, especially for
PCM_CLK.
3. EM05 works as a master device pertaining to I2C interface.
4. EM05-CML does not support I2C interface.
3.11. Control and Indicator Signals
The following table shows the pin definition of control and indicator signals.
Table 12: Pin Definition of Control and Indicator Signals
Pin No.
Pin Name
I/O
Power Domain
Description
8
W_DISABLE1#
DI
3.3V
Airplane mode control. Active low.
10
LED#
OD
It is an open drain and active low signal.
It is used to indicate the RF status of the
module.
23
WOWWAN#
OD
A signal to wake up the host.
It is open drain and active low.
26
W_DISABLE2#*
DI
1.8V
GPS control. Active low.
NOTES
Quectel
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Quectel EC2 Series Specifications

General

Brand	Quectel
Model	EC2 Series
Category	Control Unit
Language	English