參數(shù)資料
型號: XR88C681JTR-F
廠商: Exar Corporation
文件頁數(shù): 79/101頁
文件大?。?/td> 0K
描述: IC UART CMOS DUAL 44PLCC
標準包裝: 500
特點: *
通道數(shù): 2,DUART
FIFO's: 1 字節(jié),3 字節(jié)
電源電壓: 4.75 V ~ 5.25 V
帶并行端口:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 44-LCC(J 形引線)
供應(yīng)商設(shè)備封裝: 44-PLCC(16.59x16.59)
包裝: 帶卷 (TR)
XR88C681
79
Rev. 2.11
H. SPECIAL MODES OF OPERATION
H.1 RTS/CTS Handshaking
The DUART can be programmed to support RTS/CTS
Handshaking, as a means of data flow control with other
devices. This section will describe a couple of options that
the DUART allows the user in implementing RTS/CTS
Handshaking. Specifically, these options are:
D
Receiver-Controlled RTS/CTS Handshaking
D
Transmitter-Controlled RTS/CTS Handshaking
H.1.1 Receiver-Controlled RTS/CTS Handshaking
In this mode, the Receiver has the ability to automatically
negate the RTS output (to the Transmitting device).
Specifically, this mode allows the Receiver to negate the
RTS signal if its RHR is full; and, is thereby, very effective
in preventing Receiver Overrun Errors.
Figure 42
presents a diagram of an example illustrating the
operation of the Receiver-Controlled RTS configuration.
RXDA
TXDB
Receiving Device
Transmitting Device
TXDA
RXDB
RTSA
CTSB
CTSA
RTSB
FFULLA
To CPU
FFULLA
RTSA
RXDA
(OP0)
(IP1)
(IP0)
(OP4)
(OP1)
Figure 42. Block Diagram and Timing Sequence of Two DUARTs Connected
in the Receiver-RTS Controlled Configuration
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