AM79C973KCW Advanced Micro Devices, AM79C973KCW Datasheet - Page 147
AM79C973KCW
Manufacturer Part Number
AM79C973KCW
Description
PCnet-FAST III Single-Chip 10/100 Mbps PCI Ethernet Controller with Integrated PHY
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C973KCW.pdf
(304 pages)
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CSR60: Previous Transmit Descriptor Address
Lower
Bit
31-16 RES
SWSTYLE
All Other
Name
[7:0]
00h
01h
02h
03h
Reserved locations. Written as
zeros and read as undefined.
Description
LANCE/
PCnet-ISA
controller
RES
PCnet-PCI
controller
PCnet-PCI
controller
Reserved
Name
Style
P R E L I M I N A R Y
Table 25. Software Styles
Am79C973/Am79C975
Undefined
SSIZE32
0
1
1
1
15-0
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
Initialization Block
PXDAL
Entries
Contains the lower 16 bits of the
previous transmit descriptor ad-
dress pointer. The Am79C973/
Am79C975 controller has the ca-
pability to stack multiple transmit
frames.
Read/Write accessible only when
either the STOP or the SPND bit
is set. These bits are unaffected
by H_RESET, S_RESET, or
STOP.
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
147
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