- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄376452 > XR-88C681 (Exar Corporation) () PDF資料下載
參數(shù)資料
| 型號(hào)： | XR-88C681 |
| 廠商： | Exar Corporation |
| 英文描述： | () |
| 中文描述： | （） |
| 文件頁(yè)數(shù)： | 5/8頁(yè) |
| 文件大?。?/td> | 64K |
| 代理商： | XR-88C681 |
TAN - 011
A Comparison between Exar’s XR-88C681 and Motorola’s MC2681 DUART Devices
3. Command Register Bit Formats
For both of these DUART devices, each Channel contains an associated Command
Register. In general, the Channel Command Register can be written to in order “Enable or
Disable the Transmitter and/or Receiver”. However, there are numerous “Miscellaneous”
Commands which can be invoked by writing to the Channel Command Register.
The Command Register Bit Formats are slightly different between the XR-88C681 and the
MC2681 devices. Tables 3 and 4 present a summary of the Bit Formats for the
Command Registers, for each of these devices, respectively. Please note that this
information applies to both Channels A and B.
Table 3, Bit Format of Command Register (Channels A and B) for the XR-88C681
Device
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Transmitter
Commands
00 = No Change
01 = Enable Tx
10 = Disable Tx
11 = Do Not Use
(Indeterminate)
Bit 2
Bit 1
Receiver Commands
Bit 0
Miscellaneous Commands
See Table 5
00 = No Change
01 = Enable Rx
10 = Disable Rx
11 = Do Not Use
(Indeterminate)
Table 4, Bit Format of Command Register (Channels A and B) for the MC2681
Device
Bit 7*
Bit 6
Miscellaneous Commands
Bit 5
Bit 4
Bit 3
Transmitter
Commands
00 = No Change
01 = Enable Tx
10 = Disable Tx
11 = Do Not Use
(Indeterminate)
Bit 2
Bit 1
Receiver Commands
Bit 0
Not
Used
See Table 5
00 = No Change
01 = Enable Rx
10 = Disable Rx
11 = Do Not Use
(Indeterminate)
* Bit 7 is not used and may be set to either zero or one.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XR-L567 | Micropower Tone Decoder |
| XR-T3588CP | V.35 Interface Receiver/Transmitter |
| XR-T3589 | V.35 Interface Receiver/Transmitter |
| XR-T3589CN | V.35 Interface Receiver/Transmitter |
| XR-T3588-89ES | XR-T3588/89 Evaluation System |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XR-88C681/24CN | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:UART |
| XR-88C681/24N | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:UART |
| XR-88C681/28CN | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:UART |
| XR-88C681/28CP | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:UART |
| XR-88C681/28M | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:UART |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。