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參數(shù)資料
| 型號(hào)： | AM79C971KCW |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | IC LOGIC 16211 24-BIT FET BUS SWITCH -40+85C TSSOP-56 35/TUBE |
| 中文描述： | 4 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁(yè)數(shù)： | 150/265頁(yè) |
| 文件大?。?/td> | 3190K |
| 代理商： | AM79C971KCW |
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150
Am79C971
P R E L I M I N A R Y
BCR1: Master Mode Write Active
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15-0
MSWRA
Reserved
H_RESET, the value in this regis-
ter will be 0005h. The setting of
this register has no effect on any
Am79C971 controller function. It
is only included for software com-
patibility with other PCnet family
devices.
locations.
After
Read always. MSWRA is read
only. Write operations have no ef-
fect.
BCR2: Miscellaneous Configuration
Note:
Bits 15-0 in this register are programmable
through the EEPROM.
Bit
Name
Description
31-16 RES
Reserved locations. Written as
zeros and read as undefined.
15
RES
Reserved location. Written and
read as zeros.
14
TMAULOOP
When set, this bit allows external
loopback packets to pass onto
the network through the T-MAU
interface, if the T-MAU interface
has been selected. If the T-MAU
interface has not been selected,
then this bit has no effect.
Read/Write accessible always.
TMAULOOP is reset to 0 by
H_RESET and is unaffected by
S_RESET or STOP.
13
RES
Reserved location. Written and
read as zero.
12
LEDPE
LED Program Enable. When
LEDPE is set to 1, programming
of the LED0 (BCR4), LED1
(BCR5), LED2 (BCR6), and
LED3 (BCR7) registers is en-
abled. When LEDPE is cleared to
0, programming of LED0 (BCR4),
LED1 (BCR5), LED2 (BCR6),
and LED3 (BCR7) registers is
disabled. Writes to those regis-
ters will be ignored.
Read/Write accessible always.
LEDPE is cleared to 0 by
H_RESET and is unaffected by
S_RESET or by setting the STOP
bit.
11-9
RES
Reserved locations. Written and
read as zeros.
8
APROMWE Address PROM Write Enable.
The Am79C971 controller con-
tains a shadow RAM on board for
storage of the first 16 bytes load-
ed from the serial EEPROM.
Accesses to Address PROM I/O
Resources will be directed toward
this RAM. When APROMWE is
set to 1, then write access to the
shadow RAM will be enabled.
Read/Write accessible always.
APROMWE is cleared to 0 by
H_RESET and is unaffected by
S_RESET or by setting the STOP
bit.
7
INTLEVEL
Interrupt Level. This bit allows the
interrupt output signals to be pro-
grammed for level or edge-
sensitive applications.
When INTLEVEL is cleared to 0,
the INTA pin is configured for
level-sensitive applications. In
this mode, an interrupt request is
signaled by a low level driven on
the INTA pin by the Am79C971
controller. When the interrupt is
cleared, the INTA pin is tri-stated
by the Am79C971 controller and
allowed to be pulled to a high lev-
el by an external pullup device.
This mode is intended for sys-
tems which allow the interrupt
signal to be shared by multiple
devices.
When INTLEVEL is set to 1, the
INTA pin is configured for edge-
sensitive applications. In this
mode, an interrupt request is sig-
naled by a high level driven on
the INTA pin by the Am79C971
controller. When the interrupt is
cleared, the INTA pin is driven to
a low level by the Am79C971
controller. This mode is intended
for systems that do not allow
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| 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 |
| AM79C972BVIW | 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 |
|---|---|
| AM79C971VCW | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus |
| AM79C972 | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
| AM79C972BKC\\W | 制造商:Advanced Micro Devices 功能描述: |
| AM79C972BKC\W | 制造商:Advanced Micro Devices 功能描述: |
| AM79C972BKCW | 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support |
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