Quectel MC60 Series User Manual

GSM/GPRS/GNSS Module Series
MC60 Series Hardware Design
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3.11. PCM Interface
MC60 provides a PCM interface. It is used for digital audio transmission between the module and the
device. This interface is composed of PCM_CLK, PCM_SYNC, PCM_IN and PCM_OUT signal lines.
Pulse Code Modulation (PCM) is a converter that changes the consecutive analog audio signals to
discrete digital signals. The whole process of Pulse Code Modulation includes sampling, quantizing and
encoding.
Table 21: Pin Definition of PCM Interface
3.11.1. Parameter Configuration
MC60 supports 16-bit linear code PCM format through software configuration. The sample rate is 8KHz
and the clock source rate is 256KHz. The module can only act in master mode. The PCM interface
supports both long and short frame synchronization, and it only supports MSB first. For more detailed
information, please refer to the table below.
Table 22: PCM Parameter Configuration
Pin Name
Pin No. I/O
Description
Comment
PCM_OUT
60 DO
PCM data output
2.8V power domain
PCM_IN
62 DI
PCM data input
PCM_CLK
59 DO
PCM clock output
PCM_SYNC
61 DO
PCM frame synchronization
output
Parameter Description
Interface Format
Linear
Data Length
Linear: 16bits
Sample Rate
8KHz
PCM Clock/Synchronization Source
Module acts in master mode: clock and synchronization
sources are generated by module
PCM Synchronization Rate
8KHz
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Quectel MC60 Series Specifications

General

Brand	Quectel
Model	MC60 Series
Category	Control Unit
Language	English