AM79C973BKC\W AMD (ADVANCED MICRO DEVICES), AM79C973BKC\W Datasheet - Page 179
![no-image](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__sml.jpg)
AM79C973BKC\W
Manufacturer Part Number
AM79C973BKC\W
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.AM79C973BKCW.pdf
(304 pages)
Specifications of AM79C973BKC\W
Operating Supply Voltage (typ)
3.3V
Operating Supply Voltage (min)
3/3.135V
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
160
Lead Free Status / RoHS Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AM79C973BKC\WAM79C973BKCW
Manufacturer:
AMD
Quantity:
2 144
Company:
Part Number:
AM79C973BKC\WAM79C973BKCW
Manufacturer:
AMD
Quantity:
1 000
- Current page: 179 of 304
- Download datasheet (3Mb)
BCR22: PCI Latency Register
Note: Bits 15-0 in this register are programmable
through the EEPROM.
Bit
31-16 RES
15-8
MAX_LAT
SWSTYLE
Name
All Other
[7:0]
00h
01h
02h
03h
Reserved locations. Written as
zeros and read as undefined.
Maximum Latency. Specifies the
maximum arbitration latency the
Am79C973/Am79C975 controller
upper 8 bits of the 32-bit address
bus during master accesses initi-
ated
Am79C975 controller. This action
is required, since the 16-bit soft-
ware structures specified by the
SSIZE32 = 0 setting will yield
only 24 bits of address for
Am79C973/Am79C975 controller
bus master accesses.
If SSIZE32 is set, then the soft-
ware structures that are common
to
controller and the host system
will supply a full 32 bits for each
address pointer that is needed by
the Am79C973/Am79C975 con-
troller for performing master ac-
cesses.
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.
Description
the
by
Am79C973/Am79C975
PCnet-ISA
PCnet-PCI
PCnet-PCI
Reserved
controller
controller
controller
LANCE/
Name
Style
RES
the
Am79C973/
P R E L I M I N A R Y
Table 33. Software Styles
Am79C973/Am79C975
Undefined
SSIZE32
0
1
1
1
7-0
16-bit software
structures, non-burst or
burst access
RES
32-bit software
structures, non-burst or
burst access
32-bit software
structures, non-burst or
burst access
Undefined
SWSTYLE
Initialization Block
Entries
I/O resource width is determined
by the state of the DWIO bit
(BCR18, bit 7).
Software Style register. The val-
ue in this register determines the
style of register and memory re-
sources that shall be used by the
Am79C973/Am79C975
ler. The Software 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 initialization block entries.
All Am79C973/Am79C975 con-
troller CSR bits and all descriptor,
buffer, and initialization block en-
tries not cited in the Table 33 are
unaffected by the Software Style
selection and are, therefore, al-
ways fully functional as specified
in the CSR and BCR sections.
Read/Write accessible only when
either the STOP or the SPND bit
is set. The SWSTYLE register will
contain the value 00h following
H_RESET and will be unaffected
by S_RESET or STOP.
can sustain without causing prob-
lems to the network activity. The
register value specifies the time
in units of 1/4 microseconds.
MAX_LAT is aliased to the PCI
configuration
MAX_LAT (offset 3Fh). The host
will use the value in the register to
determine the setting of the
Am79C973/Am79C975 Latency
Timer register.
16-bit software structures,
non-burst access only
RES
32-bit software structures,
non-burst access only
32-bit software structures,
non-burst or burst access
Undefined
Descriptor Ring Entries
space
control-
register
179
Related parts for AM79C973BKC\W
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![AMD-751AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-751ACAMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-751](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-751AMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-X5-133SFZ](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-X5-133SFZAm5X86? Microprocessor Family
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-8131BLC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
Hyper Transport PCI-X Tunnel
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-8111AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
HyperTransport I/O Hub
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-640AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
System Controller
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-K6](/images/no-image3.png)
Part Number:
Description:
AMD-K6 Processor
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet:
![AMD-K6-2E/400AFR](/images/no-image3.png)
Part Number:
Description:
AMD-K6-2E Embedded Processor
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet:
![AMD-8132BLCT](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__tmb.jpg)
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
![AMD-K6-IIIE+550ACR](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__tmb.jpg)
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
![AMD-766AC](/images/no-image3.png)
Part Number:
Description:
Peripheral Bus Controller
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet: