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| 型號(hào)： | DS3134 |
| 廠商： | DALLAS SEMICONDUCTOR |
| 元件分類： | Digital Transmission Controller |
| 英文描述： | DATACOM, FRAMER, PBGA256 |
| 封裝： | 27 X 27 MM, PLASTIC, BGA-256 |
| 文件頁(yè)數(shù)： | 49/203頁(yè) |
| 文件大?。?/td> | 777K |
| 代理商： | DS3134 |
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DS3134
142 of 203
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bits 18 to 19 / Pending State (PENDST). This field is used by the transmit DMA to keep
track of queued descriptors as they arrive from the Pending Queue and for the DMA to know when it
should create a horizontal linked list of transmit descriptors and where it can find the next valid
descriptor. This field handles standard packets and the PRIST field handles priority packets.
State
Next Descriptor
Next Pending Descriptor
Pointer field
00
not valid
01
valid
not valid
10
not valid
valid
11
valid
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bits 20 to 21 / Priority State (PRIST). This field is used by the transmit DMA to keep track
of queued priority descriptors as they arrive from the Pending Queue and for the DMA to know when it
should create a horizontal linked list of transmit priority descriptors and where it can find the next valid
priority descriptor. This field handles priority packets and the PENDST field handles standard packets.
State
Next Priority Descriptor
Next Priority Pending
Pointer field
Descriptor Pointer field
00
not valid
01
valid
not valid
10
not valid
valid
11
valid
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bit 22/ Processing Priority Packet (PPP). This bit will be set to a one when the DMA is
currently processing a priority packet.
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 1; Bits 23 to 31/ Unused. This field is not used by the DMA and could be any value when read
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 2; Bits 0 to 15 / Next Descriptor Pointer. This 16-bit value is the offset from the Transmit
Descriptor Base Address of the next Transmit Packet Descriptor for the packet that is currently being
transmitted. Only valid if EOF = 0 or if EOF = 1 and CV = 1.
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 2; Bits 16 to 31 / Start Descriptor Pointer. This 16-bit value is the offset from the Transmit
Descriptor Base Address of the first Transmit Packet Descriptor for the packet that is currently being
transmitted. If DQS = 0, then this pointer is written back to the Done Queue when the packet has
completed transmission. This field is used by the DMA for processing standard as well as priority
packets.
- FOR DMA USAGE ONLY / HOST CAN ONLY READ THIS FIELD -
dword 3; Bits 0 to 15 / Next Pending Descriptor Pointer. This 16-bit value is the offset from the
Transmit Descriptor Base Address of the first Transmit Packet Descriptor for the packet that is queued up
next for transmission.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS3150QN | DATACOM, PCM TRANSCEIVER, PQCC28 |
| DS3150Q | DATACOM, PCM TRANSCEIVER, PQCC28 |
| DS3150TN | DATACOM, PCM TRANSCEIVER, PDIP48 |
| DS3150T | DATACOM, PCM TRANSCEIVER, PQFP48 |
| DS5000FP-12 | 8-BIT, 12 MHz, MICROCONTROLLER, PQFP80 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS-313PIN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog Miscellaneous |
| DS-313-PIN | 功能描述:信號(hào)調(diào)節(jié) RoHS:否 制造商:EPCOS 產(chǎn)品:Duplexers 頻率:782 MHz, 751 MHz 頻率范圍: 電壓額定值: 帶寬: 阻抗:50 Ohms 端接類型:SMD/SMT 封裝 / 箱體:2.5 mm x 2 mm 工作溫度范圍:- 30 C to + 85 C 封裝:Reel |
| DS31400 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:8-Input, 14-Output, Dual DPLL Timing IC with Sub-ps Output Jitter |
| DS31400DK | 功能描述:時(shí)鐘和定時(shí)器開發(fā)工具 DS31400 Dev Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Modules 類型:Clock Conditioners 工具用于評(píng)估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| DS31400GN | 功能描述:計(jì)時(shí)器和支持產(chǎn)品 Not Available From Mouser RoHS:否 制造商:Micrel 類型:Standard 封裝 / 箱體:SOT-23 內(nèi)部定時(shí)器數(shù)量:1 電源電壓-最大:18 V 電源電壓-最小:2.7 V 最大功率耗散: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Reel |
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