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參數(shù)資料
| 型號： | AM79C971 |
| 廠商： | Advanced Micro Devices, Inc. |
| 英文描述： | PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus |
| 中文描述： | PCnet⑩快速單芯片全雙工10/100 Mbps以太網(wǎng)控制器，PCI總線 |
| 文件頁數(shù)： | 157/265頁 |
| 文件大?。?/td> | 3190K |
| 代理商： | AM79C971 |
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Am79C971
157
P R E L I M I N A R Y
5
RCVME
Receive Match Status Enable.
When this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is receive ac-
tivity on the network that has
passed the address match func-
tion for this node. All address
matching modes are included:
physical, logical filtering, broad-
cast, and promiscuous.
Read/Write accessible always.
RCVME is cleared by H_RESET
and is not affected by S_RESET
or setting the STOP bit.
4
XMTE
Transmit Status Enable. When
this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is transmit
activity on the network.
Read/Write accessible always.
XMTE is cleared by H_RESET
and is not affected by S_RESET
or setting the STOP bit.
3
RXPOLE
Receive Polarity Status Enable.
When this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when normal polarity of
the RXD
±
pair has not been re-
versed.
Receive polarity indication is val-
id only if the T-MAU is in link pass
state.
Read/Write accessible always.
RXPOLE is cleared by H_RESET
and is not affected by S_RESET
or setting the STOP bit.
2
RCVE
Receive Status Enable. When
this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is receive ac-
tivity on the network.
Read/Write accessible always.
RCVE is set to 1 by H_RESET
and is not affected by S_RESET
or setting the STOP bit.
1
JABE
Jabber Status Enable. When this
bit is set, a value of 1 is passed to
the LEDOUT bit in this register
when the Am79C971 controller is
jabbering on the network.
Read/Write accessible always.
JABE is cleared by H_RESET
and is not affected by S_RESET
or setting the STOP bit.
0
COLE
Collision Status Enable. When
this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is collision
activity on the network. The activ-
ity on the collision inputs to the
AUI port within the first 4
μ
s after
every transmission for the pur-
pose of SQE testing will not
cause the LEDOUT bit to be set.
Read/Write accessible always.
COLE is cleared by H_RESET
and is not affected by S_RESET
or setting the STOP bit.
BCR6: LED2 Status
BCR6 controls the function(s) that the LED2 pin dis-
plays. Multiple functions can be simultaneously en-
abled on this LED pin. The LED display will indicate the
logical OR of the enabled functions. BCR6 defaults to
Receive Polarity Status (RXPOL) with pulse stretcher
enabled (PSE = 1) and is fully programmable.
Note:
When LEDPE (BCR2, bit 12) is set to 1, pro-
gramming of the LED2 Status register is enabled.
When LEDPE is cleared to 0, programming of the
LED2 register is disabled. Writes to those registers will
be ignored.
Note:
Bits 15-0 in this register are programmable
through the EEPROM PREAD operation.
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15
LEDOUT
This bit indicates the current
(non-stretched) value of the LED
output pin. A value of 1 in this bit
indicates that the OR of the en-
abled signals is true.
The logical value of the LEDOUT
status signal is determined by the
settings of the individual Status
Enable bits of the LED register
(bits 8 and 6-0).
Read accessible always. This bit
is read only; writes have no ef-
fect. LEDOUT is unaffected by
H_RESET, S_RESET, or STOP.
相關(guān)PDF資料 |
PDF描述 |
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| AM79C971KCW | IC LOGIC 16211 24-BIT FET BUS SWITCH -40+85C TSSOP-56 35/TUBE |
| AM79C972BKCW | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
| AM79C972BKIW | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
| AM79C972BVCW | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
| AM79C972 | PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C971AKC | 制造商:Advanced Micro Devices 功能描述: |
| AM79C971AVC | 制造商:Advanced Micro Devices 功能描述:10/100 MBPS ETHERNET - Trays |
| AM79C971AVC\\W | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AM79C971AVC\W | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| AM79C971AWW WAF | 制造商:Advanced Micro Devices 功能描述: |
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