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| 型號(hào)： | DS31256+ |
| 廠商： | Maxim Integrated Products |
| 文件頁(yè)數(shù)： | 25/183頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC CTRLR HDLC 256-CHANNEL 256BGA |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 40 |
| 控制器類型： | HDLC 控制器 |
| 接口： | 串行 |
| 電源電壓： | 3 V ~ 3.6 V |
| 電流 - 電源： | 500mA |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 256-BBGA |
| 供應(yīng)商設(shè)備封裝： | 256-BGA（27x27） |
| 包裝： | 管件 |
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DS31256 256-Channel, High-Throughput HDLC Controller
120 of 183
9.3.4 Done Queue
The DMA writes to the transmit done queue when it has finished either transmitting a complete packet
chain or a complete data buffer. This option is selected by the host when it configures the DQS field in
the transmit DMA configuration RAM (Section 9.3.5). The descriptor location is indicated in the done
queue through a 16-bit pointer that the host uses along with the transmit descriptor base address to find
the exact 32-bit address of the associated transmit descriptor.
Figure 9-19. Transmit Done-Queue Descriptor
dword 0
unused
Status (3)
CHRST
PRI
HDLC Channel (8)
Descriptor Pointer (16)
Note: The organization of the done queue is not affected by the enabling of Big Endian.
dword 0; Bits 0 to 15/Descriptor Pointer. This 16-bit value is the offset from the transmit descriptor base
address to either the first descriptor in a HDLC packet (can be a single descriptor) that has been transmitted
dword 0; Bits 16 to 23/HDLC Channel Number. HDLC channel number, which can be from 1 to 256.
00000000 (00h) = HDLC channel number 1
11111111 (FFh) = HDLC channel number 256
dword 0; Bit 24/Priority Packet (PRI). This field is meaningless in the done queue and could be set to any value.
See Section 9.3.3 for details.
dword 0; Bit 25/Channel Reset (CHRST). This field is meaningless in the done queue and could be set to any
value. See Section 9.3.3 for details.
dword 0; Bits 26 to 28/Packet Status. These three bits report the final status of an outgoing packet. All the error
states cause a HDLC abort sequence (eight 1s in a row, followed by continuous interfill bytes of either FFh or
7Eh) to be sent, and the channel is placed out of service by the transmit DMA, setting the channel enable (CHEN)
bit in the transmit DMA configuration RAM to 0. The status state of 000 is only used when the channel has been
configured by the host to write to the done queue only after a complete HDLC packet (can be a single data buffer)
has been transmitted (i.e., DQS = 0). The status states of 001, 010, and 011 are only used when the channel has
been configured by the host to write to the done queue after each data buffer has been transmitted (i.e., DQS = 1).
000 = packet transmission complete and the descriptor pointer field corresponds to the first
descriptor in a HDLC packet (can be a single descriptor) that has been transmitted (DQS = 0)
001 = first buffer transmission complete of a multi (or single) buffer packet (DQS = 1)
010 = middle buffer transmission complete of a multibuffer packet (DQS = 1)
011 = last buffer transmission complete of a multibuffer packet (DQS = 1)
100 = software provisioning error; this channel was not enabled
101 = descriptor error; either byte count = 0 or channel code inconsistent with pending queue
110 = PCI error
111 = transmit FIFO error; it has underflowed
dword 0; Bits 29 to 31/Unused. Not used by the DMA. Could be any value when read.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS31256+ | 功能描述:輸入/輸出控制器接口集成電路 256Ch High Thruput HDLC Cntlr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| DS31256B | 功能描述:輸入/輸出控制器接口集成電路 256Ch High Thruput HDLC Cntlr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| DS31256DK | 功能描述:網(wǎng)絡(luò)開發(fā)工具 RoHS:否 制造商:Rabbit Semiconductor 產(chǎn)品:Development Kits 類型:Ethernet to Wi-Fi Bridges 工具用于評(píng)估:RCM6600W 數(shù)據(jù)速率:20 Mbps, 40 Mbps 接口類型:802.11 b/g, Ethernet 工作電源電壓:3.3 V |
| DS31256-W+ | 制造商:Maxim Integrated Products 功能描述:ENVOY 256 CHANNEL HDLC - WAIVER - Rail/Tube |
| DS312BNC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Industrial Control IC |
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