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參數(shù)資料
| 型號(hào)： | AM79C976 |
| 廠(chǎng)商： | Advanced Micro Devices, Inc. |
| 英文描述： | PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| 中文描述： | PCnet -專(zhuān)業(yè)⑩個(gè)10/100Mbps PCI以太網(wǎng)控制器 |
| 文件頁(yè)數(shù)： | 189/309頁(yè) |
| 文件大?。?/td> | 2070K |
| 代理商： | AM79C976 |
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8/01/00
Am79C976
189
P R E L I M I N A R Y
part of the alternative initialization
sequence.
Read/Write accessible. These
bits are unaffected by H_RESET,
S_RESET, or STOP.
)4-)/
Bit
Name
Description
31-0
RES
Reserved locations. Written as
zeros and read as undefined.
)18$
This register is an alias of the location BCR20. Accesses
to and from this register are equivalent to accesses to
BCR20.
Bit
Name
Description
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15-11
RES
Reserved locations. Written as
zeros and read as undefined.
10
APERREN
Obsolete function. Writing has no
effect. Read as undefined.
9
RES
Reserved locations. Written as
zeros and read as undefined.
8
SSIZE32
Software Size 32 bits. When set,
this
bit
indicates
Am79C976 controller utilizes 32-
bit software structures for the ini-
tialization block and the transmit
and receive descriptor entries.
When cleared, this bit indicates
that the Am79C976 controller uti-
lizes 16-bit software structures
for the initialization block and the
transmit and receive descriptor
entries.
In
this
Am79C976 controller is back-
wards
compatible
Am7990 LANCE and Am79C960
PCnet-ISA controllers.
that
the
mode,
the
with
the
The value of SSIZE32 is deter-
mined by the Am79C976 control-
ler according to the setting of the
Software Style (SWSTYLE, bits
7-0 of this register).
SSIZE32 is read only; write oper-
ations will be ignored. SSIZE32
(since SWSTYLE defaults to 0)
and is not affected by S_RESET
or STOP.
If SSIZE32 is reset, then bits
IADR[31:24] of CSR2 will be
used to generate values for the
upper 8 bits of the 32-bit address
bus during master accesses initi-
ated by the Am79C976 controller.
This action is required, since the
16-bit software structures speci-
fied by the SSIZE32 = 0 setting
will yield only 24 bits of address
for the Am79C976 controller bus
master accesses.
If SSIZE32 is set, then the soft-
ware structures that are common
to the Am79C976 controller and
the host system will supply a full
32 bits for each address pointer
that is needed by the Am79C976
controller for performing master
accesses.
The value of the SSIZE32 bit has
no effect on the drive of the upper
8 address bits. The upper 8 ad-
dress pins are always driven, re-
gardless of the state of the
SSIZE32 bit.
Note that the setting of the
SSIZE32 bit has no effect on the
defined width for I/O resources.
I/O resource width is determined
by the state of the DWIO bit
(BCR18, bit 7).
7-0
SWSTYLE
Software Style register. The val-
ue in this register determines the
style of register and memory re-
sources that shall be used by the
Am79C976 controller. The Soft-
ware Style selection will affect the
interpretation of a few bits within
the CSR space, the order of the
descriptor entries and the width
of the descriptors and initializa-
tion block entries.
All Am79C976 controller CSR
bits and BCR bits and all descrip-
tor, buffer, and initialization block
entries not cited in Table 85 are
unaffected by the Software Style
selection and are, therefore, al-
ways fully functional as specified
in the CSR and BCR sections.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AM79C976KIW | PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| AM79C976KCW | PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| AM79C978AKCW | Single-Chip 1/10 Mbps PCI Home Networking Controller |
| AM79C978AVCW | Single-Chip 1/10 Mbps PCI Home Networking Controller |
| AM79C978 | Single-Chip 1/10 Mbps PCI Home Networking Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AM79C976KC | 制造商:Rochester Electronics LLC 功能描述:METRIC PLASTIC QUAD-RING - Bulk |
| AM79C976KCW | 制造商:AMD 制造商全稱(chēng):Advanced Micro Devices 功能描述:PCnet-PRO⑩ 10/100 Mbps PCI Ethernet Controller |
| AM79C976KD | 制造商:Advanced Micro Devices 功能描述:ETHERNET:MEDIA ACCESS CONTROLLER (MAC) |
| AM79C976KF | 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP 制造商:AMD (Advanced Micro Devices) 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP |
| AM79C976KI | 制造商:Advanced Micro Devices 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP 制造商:AMD (Advanced Micro Devices) 功能描述:Ethernet CTLR Single Chip 10Mbps/100Mbps 3.3V 208-Pin PQFP |
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