User's Manual

PAGE 5
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MOD090-LP
User’s Manual
Module Physical Interface
RF Antenna
MMCX
Module SPI Interfaces
Serial Peripheral Interface (SPI) is a full duplex synchronus serial interface that al-
lows data to be shifted in and out of the AvaLAN Baseband Processor (MOD090-LP) 8
bits at a time, most signicant bit rst.
Each SPI requires 4 pins to be physically connected:
• SCK – Serial bit shift clock (provided by master SPI)
• MISO – Master In Slave Out
• MOSI – Master Out Slave In
• CS – Active low Chip Select
There are two SPI interfaces on the MOD090-LP. The rst is a master SPI (SPI0),
operating LEDs and DIP switches. SPI0’s connections are pins 3-6. The second is a
slave SPI (SPI1) for management of the radio link, statistics, rmware upgrading,
and data transfers. SPI1’s connections are on pins 12-15.
RF Section