參數(shù)資料
型號(hào): DS31256+
廠商: Maxim Integrated Products
文件頁數(shù): 19/183頁
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
115 of 183
Figure 9-16. Transmit Packet Descriptors
dword 0
Data Buffer Address (32)
dword 1
EOF
CV
unused
Byte Count (13)
Next Descriptor Pointer (16)
dword 2
unused (24)
HDLC Channel (8)
dword 3
unused (15)
PV
Next Pending Descriptor Pointer (16)
Note 1: The organization of the transmit descriptor is not affected by the enabling of Big Endian.
Note 2: The format of the transmit descriptor is almost identical to the receive descriptor; this lessens the burden of the host in preparing
descriptors in store-and-forward applications.
Note 3: Next descriptor pointer is an index, not an absolute address.
dword 0; Bits 0 to 31/Data Buffer Address. Direct 32-bit starting address of the data buffer that is associated
with this transmit descriptor.
dword 1; Bits 0 to 15/Next Descriptor Pointer. This 16-bit value is the offset from the transmit descriptor base
address of the next descriptor in the chain. Only valid if EOF = 0 (next descriptor in the same packet chain) or if
EOF = 1 and CV = 1 (first descriptor in the next packet).
dword 1; Bits 16 to 28/Byte Count. Number of bytes stored in the data buffer. Maximum is 8188 Bytes (0000h =
0 Bytes / 1FFCh = 8188 Bytes).
dword 1; Bit 29/Unused. This bit is ignored by the transmit DMA and can be set to any value.
dword 1; Bit 30/Chain Valid (CV). If CV is set to 1 when EOF = 1, then this indicates that the next descriptor
pointer field is valid and corresponds to the first descriptor of the next packet that is queued up for transmission.
The CV bit is ignored when EOF = 0.
dword 1; Bit 31/End of Frame (EOF). When set to 1, this bit indicates that the descriptor is the last buffer in the
current packet. When set to 0, this bit indicates that next descriptor pointer field is valid and points to the next
descriptor in the packet chain.
dword 2; Bits 0 to 7/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 2; Bits 8 to 31/Unused. These bits are ignored by the transmit DMA and can be set to any value.
dword 3; Bits 0 to 15/Next Pending Descriptor Pointer. This 16-bit value is the offset from the transmit
descriptor base address to another descriptor chain that is queued up for transmission. The transmit DMA can store
up to two queued packet chains internally, but additional packet chains must be stored as a link list by the transmit
DMA using this field. This field is only valid if PV = 1, and it should be set to 0000h by the host when the host is
preparing the descriptor.
dword 3; Bit 16/Pending Descriptor Valid (PV). If set, this bit indicates that the next pending descriptor pointer
field is valid and corresponds to the first descriptor of the next packet chain that is queued up for transmission.
This field is written to by the transmit DMA to link descriptors together and should always be set to 0 by the host.
dword 3; Bits 17 to 31/Unused. These bits are ignored by the transmit DMA and can be set to any value.
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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