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參數(shù)資料
| 型號(hào)： | 82557 |
| 廠商： | Intel Corp. |
| 英文描述： | Fast Ethernet PCI Bus Controller(快速以太網(wǎng) PCI總線控制器) |
| 中文描述： | 快速以太網(wǎng)PCI總線控制器（快速以太網(wǎng)的PCI總線控制器） |
| 文件頁(yè)數(shù)： | 27/57頁(yè) |
| 文件大小： | 601K |
| 代理商： | 82557 |
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INTEL 82557 FAST ETHERNET PCI BUS CONTROLLER
27
distinguish between them. The size of the control
and status registers memory space is 32 bytes in the
I/O space and 4 Kbytes in the memory space. The
82557 treats accesses to these memory spaces
differently. For more information, refer to the
82557
User’s Manual
.
Control/Status Registers (CSR) Accesses
The 82557 supports zero wait state single cycle I/O
or memory mapped accesses to its CSR space.
Separate base address registers request 32 bytes of
both memory and I/O space to accomplish this.
Based on its needs, the software driver will use
either I/O or memory mapping to access these
registers. The 82557 provides 32 valid bytes of CSR,
which include the following elements:
1.
SCB.
2.
PORT.
3.
FLASH control register.
4.
EEPROM control register.
5.
MDI Control register.
Figure 9 and Figure 10 show CSR read and write
cycles. They show general zero wait state I/O read
and write cycles. In the case of accessing the
Control and Status structures, the CPU is the initiator
and the 82557 is the target of the transaction.
434610
Figure 9. CSR Read Cycles
相關(guān)PDF資料 |
PDF描述 |
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| 82559 | Fast Ethernet Multifunction PCI/CARD bus controller(快速以太網(wǎng)多功能PCI/CARD 總線控制器) |
| 8255A-5 | PROGRAMMABLE PERIPHEAL INTERFACE |
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| 8255A | Programmable Peripheral Interface iAPX86 Family |
| 8255A-5 | 12-Bit, 2.7 V to 5.25 V, 1.5 MSPS Low Power ADC; Package: SOIC - Wide; No of Pins: 24; Temperature Range: Industrial |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 8255702-025 | 制造商:ITT Interconnect Solutions 功能描述:NASA CONNECTOR - Bulk |
| 8255702-095 | 制造商:ITT Interconnect Solutions 功能描述:NASA CONNECTOR - Bulk |
| 8255702-096 | 制造商:ITT Interconnect Solutions 功能描述:NASA CONNECTOR - Bulk |
| 8255702-098 | 制造商:ITT Interconnect Solutions 功能描述:NASA CONNECTOR - Bulk |
| 8255704-050 | 制造商:ITT Interconnect Solutions 功能描述:NASA CONNECTOR - Bulk |
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