Quectel LTE-A Series - PCM and I2 C Interfaces

LTE-A Module Series
EG060V-EA Hardware Design
EG060V-EA_Hardware_Design 44 / 82
MCU/ARM
TXD
RXD
VDD_EXT
10K
VCC_MCU
4.7K
10K
VDD_EXT
MAIN_TXD
MAIN_RXD
MAIN_RTS
MAIN_CTS
MAIN_DTR
MAIN_RI
RTS
CTS
GND
GPIO MAIN_DCD
Module
GPIO
EINT
VDD_EXT
4.7K
GND
1 nF
1 nF
Figure 22: Reference Design of Transistor Circuit
1. The transistor circuit solution is not suitable for applications with high baud rates exceeding 460 kbps.
2. Please note that the module MAIN_CTS and MAIN_RTS are connected respectively to the host CTS
and RTS.
3.12. PCM and I2C Interfaces
EG060V-EA supports audio communication via Pulse Code Modulation (PCM) digital interface and I2C
interface.
The PCM interface supports the following mode:
⚫ Primary mode (short frame synchronization): the module works as both master and slave.
In the primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the
rising edge. The PCM_SYNC falling edge represents the MSB. In this mode, the PCM interface supports
256 kHz, 512 kHz, 1024 kHz or 2048 kHz PCM_CLK at 8 kHz PCM_SYNC, and also supports 4096 kHz
PCM_CLK at 16 kHz PCM_SYNC.
NOTES