參數(shù)資料
型號(hào): XR16C872
廠商: Exar Corporation
英文描述: Dual UART with 1284 Parallel Port and Plug-and-Play(PnP) Controller(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器))
中文描述: 雙UART)與1284并行端口,插頭插即用(PnP)功能控制器(雙通用異步接收器/發(fā)送器(帶1284雙向并行端口和即插即用控制器)
文件頁數(shù): 52/60頁
文件大?。?/td> 314K
代理商: XR16C872
XR16C872
52
Rev. P1.00
Preliminary
Figure 12. Receive Data Timing in DMA Mode 0
Figure 13. Receive Data Timing in FIFO and DMA Mode 1
RX Data fills RX
FIFO
INT
IOR#
A
B
B
B
B
B
B
B
B
B
B
B
B
B
B
RX FIFO fills to
Trigger Level
Unload RX
FIFO Data
B
B
B
A
Receive Data Ready INT
Receive Data Time-Out INT
~4 Characters
Delay
XR872RFIFO
STOP
BIT
PARITY
BIT
DATA BITS (5-8)
D0
D1
D2
D3
D4
D5
D6
D7
5 DATA BITS
6 DATA BITS
7 DATA BITS
START
BIT
RX
NEXT
DATA
START
BIT
INT
IOR#
T15D
T16D
16 BAUD RATE CLOCK
XR872RX
Active
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