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參數(shù)資料
| 型號： | DS21FT40 |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 中文描述： | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| 文件頁數(shù)： | 60/87頁 |
| 文件大?。?/td> | 386K |
| 代理商： | DS21FT40 |
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DS21FT40
60 of 87
SYMBOLS
POSITION
NAME AND DESCRIPTION
RHALF
HIMR.4
Receive FIFO Half Full.
0 = interrupt masked.
1 = interrupt enabled.
Receive FIFO Not Empty.
0 = interrupt masked.
1 = interrupt enabled.
Transmit FIFO Half Empty.
0 = interrupt masked.
1 = interrupt enabled.
Transmit FIFO Not Full.
0 = interrupt masked.
1 = interrupt enabled.
Transmit Message End.
0 = interrupt masked.
1 = interrupt enabled.
RNE
HIMR.3
THALF
HIMR.2
TNF
HIMR.1
TMEND
HIMR.0
RHIR: RECEIVE HDLC INFORMATION REGISTER (Address=B3 Hex)
(MSB)
RABT
RCRCE
ROVR
RVM
(LSB)
OBYTE
REMPTY
POK
CBYTE
SYMBOLS
RABT
POSITION
RHIR.7
NAME AND DESCRIPTION
Abort Sequence Detected. Set whenever the HDLC controller
sees 7 or more ones in a row.
CRC Error. Set when the CRC checksum is in error.
Overrun. Set when the HDLC controller has attempted to
write a byte into an already full receive FIFO.
Valid Message. Set when the HDLC controller has detected
and checked a complete HDLC packet.
Empty. A real–time bit that is set high when the receive FIFO
is empty.
Packet OK. Set when the byte available for reading in the
receive FIFO at RHFR is the last byte of a valid message (and
hence no abort was seen, no overrun occurred, and the CRC
was correct).
Closing Byte. Set when the byte available for reading in the
receive FIFO at RFDL is the last byte of a message (whether
the message was valid or not).
Opening Byte. Set when the byte available for reading in the
receive FIFO at RHFR is the first byte of a message.
RCRCE
ROVR
RHIR.6
RHIR.5
RVM
RHIR.4
REMPTY
RHIR.3
POK
RHIR.2
CBYTE
RHIR.1
OBYTE
RHIR.0
NOTE:
The RABT, RCRCE, ROVR, and RVM bits are latched and will be cleared when read.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS21FT42 | Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0 |
| DS21Q50N | Telecommunication IC |
| DS21Q55DK | Quad T1/E1/J1 Transceiver Design Kit Daughter Card |
| DS21Q55 | Quad T1/E1/J1 Transceiver |
| DS21Q55N | Quad T1/E1/J1 Transceiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS21FT40N | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS21FT42 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21FT42N | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4x4 16/4x3 12 Chnl T1/T1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21FT44 | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| DS21FT44+ | 功能描述:網(wǎng)絡(luò)控制器與處理器 IC 4X3 E1 Framer E1 Framer E1 Framer RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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