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參數(shù)資料
| 型號： | TSB81BA3I |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | IEEE 1394b THREE-PORT CABLE TRANSCEIVER/ARBITER |
| 中文描述： | 的IEEE 1394b三端口電纜收發(fā)器/仲裁者 |
| 文件頁數(shù)： | 46/57頁 |
| 文件大?。?/td> | 810K |
| 代理商： | TSB81BA3I |
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SLLS559B DECEMBER 2002 REVISED OCTOBER 2003
46
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION (1394B INTERFACE)
LLC service request (continued)
Table 30. Write Register Request
BIT(s)
NAME
DESCRIPTION
0
Start bit
Indicates the beginning of the transfer (always 1)
14
Request type
A 1011 indicates this is a write register request
58
Address
Identifies the address of the PHY register to be written
916
Data
Gives the data that is to be written to the specified register address
17
Stop bit
Indicates the end of the transfer (always 0)
For a link notification request, the length of the LREQ bit stream is 6 bits as shown in Table 31.
Table 31. Link Notification Request
BIT(s)
NAME
DESCRIPTION
0
Start bit
Indicates the beginning of the transfer (always 1)
14
Request type
A 1100, 1101, or 1110 indicates this is a link notification request
5
Stop bit
Indicates the end of the transfer (always 0)
For fair or priority access, the LLC sends a bus request at least one clock after the PHY-LLC interface becomes
idle. The PHY queues all bus requests and can queue one request of each type. If the LLC issues a different
request of the same type, then the new request overwrites any nonserviced request of that type. Note, upon
the receipt (CTL terminals are asserted to the receive state, 10b) of a packet, queued requests are not cleared
by the PHY.
The cycle master node uses a cycle start request (Cyc_Start_Req) to send a cycle start message. After
receiving or transmitting a cycle start message, the LLC can issue an isochronous bus request (IsoReq). The
PHY clears an isochronous request only when the serial bus has been won.
To send an acknowledge packet, the LLC must issue an immediate bus request (Immed_Req) during the
reception of the packet addressed to it. This is required in order to minimize the idle gap between the end of
the received packet and the start of the transmitted acknowledge packet. As soon as the received packet ends,
the PHY immediately grants control of the bus to the LLC. The LLC sends an acknowledgment to the sender
unless the header CRC of the received packet is corrupted. In this case, the LLC does not transmit an
acknowledge, but instead cancels the transmit operation and releases the interface immediately; the LLC must
not use this grant to send another type of packet. After the interface is released the LLC may proceed with
another request.
For write register requests, the PHY loads the specified data into the addressed register as soon as the request
transfer is complete. For read register requests, the PHY returns the contents of the addressed register to the
LLC at the next opportunity through a PHY status transfer. A write or read register request may be made at any
time, including while a bus request is pending. Once a read register request is made, the PHY ignores further
read register requests until the register contents are successfully transferred to the LLC. A bus reset does not
clear a pending read register request.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TSB81BA3IPFP | 功能描述:射頻收發(fā)器 s800 3-Port Cable Xcvr/Arbiter RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| TSB81BA3IPFPEP | 功能描述:射頻收發(fā)器 Mil Enh 3-Port Cable Xcvr/Arbiter RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| TSB81BA3PFP | 功能描述:射頻收發(fā)器 s800 3-Port Cable Xcvr/Arbiter RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| TSB81BA3PFPG4 | 功能描述:射頻收發(fā)器 s800 3-Port Cable Xcvr/Arbiter RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| TSB82AA2 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1394b OHCI-LYNX CONTROLLER |
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