SimCom SIM800L User Manual

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SIM800L(MT6261)_Hardware Design_V1.01 40 2016-07-07
SIM800L PCM interface only supply master mode, data length is 16 bits (linear)，PCM clock rate is 256KHz.
Table 21: PCM specification
Note: Customer can use AT command control PCM interface. For detail, please refer to document [1].
4.9.1. PCM Interface
Refer to the following figure for PCM design:
Module
CODEC
PCMIN
PCMSYNC
PCMOUT
PCMCLK
GND
GND
PCM_IN
PCM_OUT
PCM_SYNC
PCM_CLK
Figure 36: PCM reference circuit
4.10. Keypad Interface
The keypad interface consists of 5 keypad column outputs and 5 keypad row inputs. with total 5*5*2, which is 50
keys. Module has two connections, which supports 25 keys and anther supports 50 keys.
PCM_CLK 29 PCM clock
PCM_OUT 30 PCM data output
PCM_SYNC 65 PCM synchrony
PCM_IN 66 PCM data input
Parameter Specification
Line Interface Format
Linear(Fixed)
Data length 16bits(Fixed)
PCM Clock/Sync Source
Master Mode(Fixed)
PCM Clock Rate 256KHz(Fixed)
PCM Sync Format Short sync/Long sync both support
Zero Padding/Sign extension Zero Padding(Fixed)
Data Ordering MSB/LSB both support
SIMCOM CONFIDENTIAL FILE

SimCom SIM800L Specifications

General

Brand	SimCom
Model	SIM800L
Category	Recording Equipment
Language	English