参数资料
型号: XR88C681P/40-F
厂商: Exar Corporation
文件页数: 79/101页
文件大小: 0K
描述: IC UART CMOS DUAL 40PDIP
标准包装: 9
特点: *
通道数: 2,DUART
FIFO's: 1 字节,3 字节
电源电压: 4.75 V ~ 5.25 V
带并行端口:
带CMOS:
安装类型: 通孔
封装/外壳: 40-DIP(0.600",15.24mm)
供应商设备封装: 40-PDIP
包装: 管件
其它名称: 1016-1640
XR88C681P/40-F-ND
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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