FIGURE 20. R
參數(shù)資料
型號: XR16C2550IMTR-F
廠商: Exar Corporation
文件頁數(shù): 25/37頁
文件大?。?/td> 0K
描述: IC UART FIFO 16B DUAL 48TQFP
標準包裝: 1,500
特點: *
通道數(shù): 2,DUART
FIFO's: 16 字節(jié)
規(guī)程: RS232,RS485
電源電壓: 2.97 V ~ 5.5 V
帶故障啟動位檢測功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 48-TQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 帶卷 (TR)
XR16C2550
31
REV. 1.0.2
2.97V TO 5.5V DUART WITH 16-BYTE FIFO
FIGURE 20. RECEIVE READY & INTERRUPT TIMING [FIFO MODE, DMA ENABLED] FOR CHANNELS A & B
FIGURE 21. TRANSMIT READY & INTERRUPT TIMING [FIFO MODE, DMA MODE DISABLED] FOR CHANNELS A & B
RX
RXRDY#
IOR#
INT
D0:D7
S
T
SSR
RXFIFODMA
RX FIFO fills up to RX
Trigger Level or RX Data
Timeout
RX FIFO drops
below RX
Trigger Level
FIFO
Empties
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
RR
T
RRI
T
SSI
(Reading data out
of RX FIFO)
TX
TXRDY#
IOW#
INT*
TXDMA#
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
(Unloading)
(Loading data
into FIFO)
Last Data Byte
Transmitted
TX FIFO no
longer empty
Data in
TX FIFO
Empty
T
WT
T
SRT
TX FIFO
Empty
T
S
T
SI
ISR is read
IER[1]
enabled
*INT is cleared when the ISR is read or when there is at least one character in the FIFO.
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