User's Manual

Smart Machine Smart Decision
SIM5320ALD_User Manual_V1.01 2014-08-20
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on USB data lines. Typically, the capacitance should be less than 4pF @1MHz.
Note
：
The SIM5320ALD has two kinds of interface (UART and USB) to connect to host CPU. USB interface is mapped
to five virtual ports: “SIMTECH USB Modem”, “SIMTECH NMEA Device”, “SIMTECH ATCOM Device”,
“SIMTECH Diagnostics interface” and “SIMTECH Wireless Ethernet Adapter”.
3.8 SPI Interface
SPI interface of SIM5320ALD is master only. It provides a duplex, synchronous, serial communication
link with peripheral devices. Its operation voltage is 1.8V, with clock rates up to 26 MHz.
3.8.1 Pin Description
Table 21: Electronic characteristic
Pin name
1.8V mode
Min Typ Max
SPI_CLK 1.65 1.8 1.95
SPI_CS_N 1.65 1.8 1.95
SPI_MOMI_DATA 1.65 1.8 1.95
SPI_MIMO_DATA 1.65 1.8 1.95
Table 22: Pin description
3.9 GPIO Interface
SIM5320ALD provides a limited number of GPIO pins. All GPIOs can be configured as inputs or outputs.
User can use AT Commands to read or write GPIOs status. Refer to ATC document for details.
3.9.1 Pin Description
Table 23: Electronic characteristic
Pin name Pin No. Function
SPI_CS 9 SPI chip-select; not mandatory in a point-to-point connection
SPI_MISO_DATA 7 SPI master in/slave out data
SPI_CLK 6 SPI clock
SPI_MOSI_DATA 8 SPI master out/slave in data