44.5.6.2 Address Calculation for the First-in Entry and Last-in Entry
in the RX FIFO
The memory address of the first-in entry in the RX FIFO is computed by the following
equation:
The memory address of the last-in entry in the RX FIFO is computed by the following
equation:
RX FIFO Base - Base address of RX FIFO
RXCTR - RX FIFO counter
POPNXTPTR - Pop Next Pointer
RX FIFO Depth - Receive FIFO depth, implementation specific
Chapter 44 Serial Peripheral Interface (SPI)
K22F Sub-Family Reference Manual , Rev. 3, 7/2014
Freescale Semiconductor, Inc.
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