Smart Machine Smart Decision
Figure 28: USB interface
Because of high bit rate on USB bus, pay attention to influence of junction capacitance of ESD component
on USB data lines. Typically, the capacitance should be less than 4pF @1MHz.
Note
：
The SIM5320J-TE 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”.
3.9
SPI Interface
SPI interface of SIM5320J-TE 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.
3.9.1
Pin Description
Table 22: Electronic characteristic
DC Characteristics
Pin name
Min
Typ
Max
SPI_CLK
-0.3
1.8
2.1
SPI_CS_N
-0.3
1.8
2.1
SPI_MOMI_DATA
-0.3
1.8
2.1
SPI_MIMO_DATA
-0.3
1.8
2.1
SIM5320J-TE_Hardware Design_V1.01
2012-11-09
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