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參數(shù)資料
| 型號(hào)： | W89C926 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER |
| 中文描述： | PCMCIA以太網(wǎng)雙絞線網(wǎng)絡(luò)接口控制器 |
| 文件頁(yè)數(shù)： | 24/48頁(yè) |
| 文件大小： | 395K |
| 代理商： | W89C926 |
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W89C926 PENTIC+
- 24 -
BUS ARBITRATION AND STATE DIAGRAM
The PENTIC+ handles bus arbitration automatically. It can operate in four modes: idle state, slave
read/write mode, DMA mode, and shared memory mode. The PENTIC+ controls the on-board
devices by decoding these modes.
At power-on, the PENTIC+ is in idle mode. If a register read/write command is issued, the PENTIC+
enters the slave read/write mode. If a local DMA or remote DMA (I/O mode only) is initiated by the
PENTIC+ core coprocessor, the PENTIC+ enters DMA mode. A memory command will place the
PENTIC+ in memory mode. At any given time, the PENTIC+ can be in only one state. The PENTIC+
handles state changes automatically. However, two events, such as a DMA command and a memory
command, may be requested at the same time; in this case, the PENTIC+ allocates the bus on a first-
come, first-served basis. No predefined priority is set within the PENTIC+.
Power-on
Reset
Idle
Slave read/ write
DMA operation
Memory operation
Register
access
Core
Memory
access
access
In cases where the system has no authority on the requested bus, the PENTIC+ will drive the WAIT
pin low so that the system can insert wait states. After the PENTIC+ has released the bus authority,
WAIT is deasserted to instruct the system to stop inserting wait states.
SLCT CORE FUNCTION
The SLCT core coprocessor has five major logic blocks that control Ethernet operations: the register
files, transmit logic, receive logic, FIFO logic, and DMA logic. The relationship between these blocks
is depicted in the following block diagram.
PCMCIA
Slot
Interface
DMA
Interface
Logic
SNA
TX/RX
Logic
16-byte
FIFO
Transmit
Logic
Receive
Logic
Register
File
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W89C926F | 10M PCMCIA Ethernet Network Interface Controller |
| W89C940 | ELANC-PCI (TWISTED-PAIR ETHER-LAN CONTROLLER WITH PCI INTERFACE) |
| W89C982 | INTEGRATED MULTIPLE REPEATER II |
| W89C982AF | INTEGRATED MULTIPLE REPEATER II |
| W8NB80 | N - CHANNEL 800V - 1.2ohm - 7.5A - TO-247 PowerMESH MOSFET |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W89C926F | 制造商:WINBOND 制造商全稱:Winbond 功能描述:10M PCMCIA Ethernet Network Interface Controller |
| W89C926PENTIC+ | 制造商:WINBOND 制造商全稱:Winbond 功能描述:PCMCIA ETHERNET NETWORK TWISTED PAIR INTERFACE CONTROLLER |
| W89C92P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10M CMOS Coaxial Transceiver |
| W89C940 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:ELANC-PCI (TWISTED-PAIR ETHER-LAN CONTROLLER WITH PCI INTERFACE) |
| W89C940F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:10M PCI-Bus Ethernet Network Interface Controller |
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