User guide

Redpine Signals, Inc. Proprietary and Confidential. Page 100
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4.5 Host Interactions using SPI commands.
This section describes the procedures to be followed by the Host to interact with
the RS9110-N-11-2X module using SPI commands.
The Host interactions to the module could be categorized as below
Command
Command Category
Memory write
Master Write
Memory read
Master Read
Frame write
Slave Write
Frame read
Slave Read
Register write
SPI Interface Internal Registers Write/
master write
Register Read
SPI Interface Internal Registers
Read/Master read
Table 6: Command Types
4.5.1 Memory Write (Master Write)
Host accesses the memory of the RS9110-N-11-2X module to upgrade the
firmware and configure some memory addresses. Memory write is also referred
to as master write.
To write into a memory location, memory write command has to be framed as
described in the figure below. If a “busy” or “failure” response is sent from the
slave, the retries need to be done or the slave should be reset.