FIGURE 21. R<" />
參數(shù)資料
型號(hào): XR19L222IL64-0B-EB
廠(chǎng)商: Exar Corporation
文件頁(yè)數(shù): 44/53頁(yè)
文件大?。?/td> 0K
描述: EVAL BOARD FOR XR19L202 64QFN
標(biāo)準(zhǔn)包裝: 1
系列: *
XR19L222
49
REV. 1.0.1
TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
FIGURE 21. RECEIVE READY INTERRUPT TIMING [FIFO MODE]
FIGURE 22. TRANSMIT READY INTERRUPT TIMING [FIFO MODE]
RX
INT
D0:D7
S
T
SSR
RXINTDMA#
RX FIFO fills up to RX
Trigger Level or RX Data
Timeout
RX FIFO drops
below RX
Trigger Level
D0:D7
S
D0:D7
T
D0:D7
S
D0:D7
S
T
D0:D7
S
T
D0:D7
S
T
Start
Bit
Stop
Bit
T
SSI
IOR#
T
RRI
(Reading data out
of RX FIFO)
TX
INT*
TX INT
D0:D7
S
D0:D7
T
D0:D7
S
D0:D7
S
T
D0:D7
S
T
D0:D7
S
T
Start
Bit
Stop
Bit
T
WRI
Last Data Byte
Transmitted
TX FIFO fills up
to trigger level
TX FIFO drops
below trigger level
TX FIFO
Empty
T
S
T
SI
ISR is read
IER[1]
enabled
ISR is read
IOW#
(Loading data
into FIFO)
*INT is cleared when the ISR is read or when TX FIFO fills up to the trigger level.
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