参数资料
型号: XR88C681P/40-F
厂商: Exar Corporation
文件页数: 56/101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
58
Rev. 2.11
Figure 30. Receiver (1X) Sampling, if the RX Clock is Slightly Faster Than the TX Clock
Figure 30 shows that the phase relationship between the Receiver’s sampling point and each serial data bit is changing.
In this case, the Receiver is sampling each serial data bit, earlier and earlier in the bit period, with each successive data
bit. This phenomenon is known as receiver drift. If there is no correction for receiver drift, there will be many errors in the
transmission and reception of this serial data, as depicted in
Figure 31.
Actual Data
Received Data
Figure 31. Illustration of an Error due to Receiver Drift
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Figure 31 shows the Receiver sampling an eight bit string of data with bit pattern 0101010. It is interesting to note that, in
Figure 31, the Receiver sampled 01010010. It should be noted that Receiver drift can also be a problem is the local
Receiver is slower than the remote Transmitter clock.
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