Deserial Serial Peripheral Interface (DSPI) RM0046
484/936 Doc ID 16912 Rev 5
Equation 29
The memory address of the last-in entry in the RX FIFO is computed by the following
equation:
Equation 30
where:
RXFIFO base = base address of receive FIFO
RXCTR = receive FIFO counter
POPNXTPTR = pop next pointer
RX FIFO depth = receive FIFO depth (depth is 5)
First-in entry address = RXFIFO base + 4 × (POPNXTPTR)
Last-in entry address = RXFIFO base + 4 × [(RXCTR + POPNXTPTR – 1) modulo RXFIFO depth]
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