- 您现在的位置：买卖IC网 > PDF目录16136 > TS-MAC-XM-U4 (Lattice Semiconductor Corporation)IP CORE ETH MAC TRI-SPEED XP PDF资料下载
参数资料
| 型号： | TS-MAC-XM-U4 |
| 厂商： | Lattice Semiconductor Corporation |
| 文件页数： | 33/66页 |
| 文件大小： | 0K |
| 描述： | IP CORE ETH MAC TRI-SPEED XP |
| 标准包装： | 1 |
| 系列： | * |
| 其它名称： | TSMACXMU4 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页当前第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页
Lattice Semiconductor
Functional Description
Additional Notes:
? The MAC Tx state machine may do other processing, such as inserting IPG after a previous packet is transmit-
ted, so even if tx_fifoempty is low and tx_fifoavail is high the MAC may not assert the tx_macread right away.
? There are many ways to interface client logic and FIFOs to the MAC - here are two examples:
1.) An appropriate threshold level for the Tx FIFO is chosen which indicates that a full frame is ready to be
sent. This is used as the tx_fifoavail signal. If there are variable size packets (some small) one may want to
OR this threshold with a frames_present signal. frames_present is a frames counter that keeps track of
EOPs into and out of the FIFO. Whenever the FIFO is Not Almost Empty and there is at least one full
packet in the FIFO tx_fifoavail is set high to indicate it is safe to transmit a packet.
2.) Decouple the tx_fifoempty and tx_fifoavail signals from the actual Tx FIFO and generate tx_fifoavail and
tx_fifoempty signals from a simple state machine:
I) Keep tx_fifoavail low and tx_fifoempty high - load Tx FIFO
II) When packet is fully loaded into Tx FIFO assert tx_fifoavail high and de-assert tx_fifoempty (set to
not empty)
III) When packet is completely pulled out of FIFO, de-assert tx_fifoavail and force tx_fifoempty high
Successful Transmission of a 64-byte Frame with FIFO Empty - Tx MAC Application Inter-
face
tx_fifoempty is asserted along with tx_fifoeof to indicate that the complete 64-byte frame has been read.
The frame is transmitted as a valid frame and tx_done is asserted at the end of transmission.
Figure 2-13. Successful Transmission of a 64-byte Frame with FIFO Empty
txmac_clk
tx_fifoavail
tx_fifodata[7:0]
1
2
62
63
64
tx_macread
tx_staten
tx_staten[31:0]
tx_fifoeof
tx_fifoempty
tx_discfrm
tx_done
Valid
IPUG51_03.0, December 2010
33
Tri-Speed Ethernet MAC User’s Guide
相关PDF资料 |
PDF描述 |
|---|---|
| ESM12DSES-S243 | CONN EDGECARD 24POS .156 EYELET |
| M3BFK-2040K | IDC CABLE - MSR20K/MC20F/MCF20K |
| M3BGK-2040K | IDC CABLE - MSR20K/MC20F/MCS20K |
| M3BEK-2040K | IDC CABLE - MSR20K/MC20F/MCE20K |
| TS-MAC-X2-U4 | IP CORE ETH MAC 3SPD LATTICEXP2 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS-MAC-XM-UT4 | 功能描述:开发软件 ETHERNET MAC TRI-SPEED RoHS:否 制造商:Atollic Inc. 产品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors |
| TSMBG0505C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SINGLE BIDIRECTIONAL BREAKOVER DIODE|100V V(BO) MAX|DO-215AA |
| TSMBG0506C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SINGLE BIDIRECTIONAL BREAKOVER DIODE|110V V(BO) MAX|DO-214AA |
| TSMBG0507C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SINGLE BIDIRECTIONAL BREAKOVER DIODE|145V V(BO) MAX|DO-214AA |
| TSMBG0509C | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SINGLE BIDIRECTIONAL BREAKOVER DIODE|185V V(BO) MAX|DO-215AA |
发布紧急采购，3分钟左右您将得到回复。