参数资料
型号: XR88C681P/40-F
厂商: Exar Corporation
文件页数: 86/101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
85
Rev. 2.11
TXDn
RXDn
Master Device
Slave Devices
00h
01h
02h
FFh
Figure 46. An Illustration Depicting the Concept of Multi-Drop Mode
A/D
LSB
MSB
8 Bit Character
Address/Data Bit
Figure 47. Bit Format of Character Data Being Transmitted in the Multi-Drop Mode
The “Master Station” communicates to the “Slave
Stations” by transmitting a character (typically a byte) with
an “Address/Data” bit flag appended to the end of the
character. This typically results in nine bits of being
transmitted for every character byte, as presented in
Figure 47.
When the “Master Station” wants to transmit a block of
data to one of several slaves, it first sends out an Address
byte that identifies the “Target Slave”. An address byte
differs from a data byte in that the ninth bit is a “1” in an
Address Byte and a “0” in a Data Byte.
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