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XR18W750 Datasheet, PDF (41/44 Pages) Exar Corporation – WIRELESS UART CONTROLLER
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REV. 1.0.0
XR18W750
WIRELESS UART CONTROLLER
FIGURE 18. RECEIVE READY & INTERRUPT TIMING [FIFO MODE, DMA DISABLED] - PARALLEL MODE
Start
Bit
RX
S D0:D7 S D0:D7 T
D0:D7 S D0:D7 T S D0:D7 T S D0:D7 T S D0:D7 T
Stop
Bit
INT
TSSR
RXRDY#
First Byte is
Received in
RX FIFO
TSSI
RX FIFO fills up to RX
Trigger Level or RX Data
Timeout
RX FIFO drops
below RX
Trigger Level
FIFO
Empties
TRRI
TRR
IOR#
(Reading data out
of RX FIFO)
RXINTDMA#
FIGURE 19. RECEIVE READY & INTERRUPT TIMING [FIFO MODE, DMA ENABLED] - PARALLEL MODE
RX
INT
RXRDY#
Start
Bit
Stop
Bit
S D0:D7 S D0:D7 T
D0:D7 S D0:D7 T S D0:D7 T S D0:D7 T S D0:D7 T
TSSI
RX FIFO drops
below RX
Trigger Level
RX FIFO fills up to RX
Trigger Level or RX Data
TSSR
Timeout
FIFO
Empties
IOR#
(Reading data out
of RX FIFO)
TRRI
TRR
RXFIFODMA
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