參數(shù)資料
型號(hào)： 82559
廠商： INTEL CORP
元件分類： 微控制器/微處理器
英文描述： Fast Ethernet Multifunction PCI/CARD bus controller(快速以太網(wǎng)多功能PCI/CARD 總線控制器)
中文描述： 1 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PBGA196
封裝： 15 X 15 MM, BGA-196
文件頁(yè)數(shù)： 95/124頁(yè)
文件大?。?/td> 1332K
代理商： 82559
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Networking Silicon — 82559
Datasheet
85
10.0
PHY Unit Registers
The 82559 provides status and accepts management information via the Management Data
Interface (MDI) within the CSR space.
Acronyms mentioned in the registers are defined as follows:
SC:
Self cleared.
RO:
Read only.
E:
EEPROM setting affects content.
LL:
Latch low.
LH:
Latch high.
10.1
MDI Registers 0 - 7
10.1.1
Register 0: Control Register Bit Definitions
Bit(s)
Name
Description
Default
R/W
15
Reset
This bit sets the status and control register of the PHY to
their default states and is self-clearing. The PHY returns
a value of one until the reset process has completed and
accepts a read or write transaction.
1 = PHY Reset
0
RW
SC
14
Loopback
This bit enables loopback of transmit data nibbles from
the TXD[3:0] signals to the receive data path. The PHY
unit’s receive circuitry is isolated from the network.
Note that this may cause the descrambler to lose
synchronization and produce 560 nanoseconds of “dead
time.”
Note also that the loopback configuration bit takes priority
over the Loopback MDI bit.
1 = Loopback enabled
0 = Loopback disabled (Normal operation)
0
RW
13
Speed Selection
This bit controls speed when Auto-Negotiation is disabled
and is valid on read when Auto-Negotiation is disabled.
1 = 100 Mbps
0 = 10 Mbps
1
RW
12
Auto-Negotiation
Enable
This bit enables Auto-Negotiation. Bits 13 and 8, Speed
Selection and Duplex Mode, respectively, are ignored
when Auto-Negotiation is enabled.
1 = Auto-Negotiation enabled
0 = Auto-Negotiation disabled
1
RW
11
Power-Down
This bit sets the PHY unit into a low power mode. In low
power mode, the PHY unit consumes no more than 30
mA.
1 = Power-Down enabled
0 = Power-Down disabled (Normal operation)
0
RW
10
Reserved
This bit is reserved and should be set to 0b.
0
RW
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