參數(shù)資料
型號: XR88C681P/40
廠商: Exar Corporation
文件頁數(shù): 86/101頁
文件大?。?/td> 0K
描述: IC UART CMOS DUAL 40PDIP
產(chǎn)品變化通告: Leaded UART, V&I Obsolescence 11/Apr/2011
標準包裝: 9
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: 通孔
封裝/外殼: 40-DIP(0.600",15.24mm)
供應(yīng)商設(shè)備封裝: 40-PDIP
包裝: 管件
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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