Product Info

LTE-A Module Series
EM06 Hardware Design
EM06_Hardware_Design 34 / 63
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
I2C_SCL
I2C_SDA
Module
1.8V
4.7K
BCLK
LRCK
DAC
ADC
SCL
SDA
BIAS
MICBIAS
INP
INN
LOUTP
LOUTN
Codec
4.7K
Figure 19: Reference Circuit of PCM Application with Audio Codec
1. It is recommended to reserve an RC (R=22Ω, C=22pF) circuit on the PCM lines, especially for
PCM_CLK.
2. EM06 works as a master device pertaining to I2C interface.
3.9. Control and Indicator Signals
The following table shows the pin definition of control and indicator signals.
Table 11: List of Control and Indicator Signals
Pin No.
Pin Name
I/O
Power Domain
Description
10
WWAN_LED#
OD
3.3V
It is an open collector and active low
signal.
It is used to indicate the RF status of
the module.
23
WAKE_ON_WAN#
OD
1.8V
A signal to wake up the host.
It is an open collector and active low
signal.
8
W_DISABLE1#
DI
1.8V/3.3V
Airplane mode control. Active low.
26
W_DISABLE2#*
DI
1.8V/3.3V
GNSS enable control. Active low.
25
DPR
DI
1.8V
Dynamic power reduction. High level
by default.
NOTES