Pcm Interface; Lcd Display/Spi Interface - SimCom SIM808 Hardware Design

4.11.2 PCM Interface

Refer to the following figure for PCM design:

4.11.3 LCD Display/SPI Interface

SIM808 provides a serial interface. It could be used as SPI interface in the embedded AT application. For details
about embedded AT application, please refer to document [1].
Refer to the following figure for SPI design:
Note: This function is not supported in the standard firmware. If user wants this function, the firmware must be customized.
Please contact SIMCom for more details.
SIM808_Hardware Design_V1.00
Figure 40: PCM reference circuit
DISP_CS
DISP_D/C
DISP_CLK
DISP_DATA
GND
Figure 41: LCD reference circuit
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SPI_CS
SPI_D/C
SPI_CLK
SPI_DATA
GND
2014.03.27