參數(shù)資料
型號(hào)： AM79C970AKCW
廠商： ADVANCED MICRO DEVICES INC
元件分類： 微控制器/微處理器
英文描述： PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
中文描述： 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP132
封裝： PLASTIC, QFP-132
文件頁(yè)數(shù)： 218/219頁(yè)
文件大?。?/td> 1065K
代理商： AM79C970AKCW
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AMD
E-4
Am79C970A
BCR17: I/O Base Address Upper
I
This register is no longer programmable through
the EEPROM. The register is reserved and has no
effect on the operation of the device. It is only used
in the PCnet-32.
BCR18: Burst Size and Bus Control
I
New bits: ROMTMG (bits 15–12), Expansion ROM
Timing. Was reserved location, read and written as
ZERO.
I
New bit: MEMCMD (bit 9), Memory Command.
Was reserved location, read and written as ZERO.
I
New bit: EXTREQ (bit 8), Extended Request. Was
reserved location, read and written as ONE.
I
BREADE (bit 6), Burst Read Enable. Extended
functionality of bit. Besides enabling burst read
accesses to the transmit buffer, BREADE will now
also enable burst read accesses to the initialization
block and, if SWSTYLE = 3, to the descriptor
ring entries.
I
BWRITE (bit 5), Burst Write Enable. Extended
functionality of bit. Besides enabling burst write
accesses to the receive buffer, BWRITE will now
also enable burst write accesses to the descriptor
ring entries, if SWSTYLE = 3.
I
LINBC (bits 2–0), Linear Burst Count. These bits
are now reserved and have no effect on the opera-
tion of the device.
BCR20: Software Style
I
New bit: APERREN (bit 10), Advanced Parity Error
Handling Enable. Was reserved location, read and
written as ZERO.
I
SWSTYLE (bits 7–0), Software Style. New option,
value of THREE selects new PCnet-PCI controller
style that reorders 32-bit descriptor entries to allow
burst accesses.
BCR21: Interrupt Control
I
This register is no longer programmable through
the EEPROM. The register is reserved and has no
effect on the operation of the device. It is only used
in the PCnet-32.
BCR22: PCI Latency
I
New register. Was reserved location, read and
written as ZERO.
Receive Descriptor
RMD1
I
New bit: BPE (bit 23), Bus Parity Error. This bit is
active only if 32-bit software structures are used
for the descriptor ring entries (SWSTYLE = ONE,
TWO or THREE) and if APERREN (BCR20, bit 10)
is set to ONE. Was reserved location, read and
written as ZERO.
I
New bit: PAM (bit 22), Physical Address Match.
This bit is active only if 32-bit software structures
are used for the descriptor ring entries (SWSTYLE
= ONE, TWO or THREE). Was reserved location,
read and written as ZERO.
I
New bit: LAFM (bit 21), Logical Address Filter
Match. This bit is active only if 32-bit software
structures are used for the descriptor ring entries
(SWSTYLE = ONE, TWO or THREE). Was re-
served location, read and written as ZERO.
I
New bit: BAM (bit 20), Broadcast Address Match.
This bit is active only if 32-bit software struc-
tures are used for the descriptor ring entries
(SWSTYLE = ONE, TWO or THREE). Was re-
served location, read and written as ZERO.
Transmit Descriptor
TMD1
I
New bit: LTINT (bit 28), Last Transmit Interrupt.
This bit is only active, if LTINTEN (CSR5, bit 14) is
set to ONE. This bit location is shared with the
MORE status bit. The host will write the bit as
LTINT and read it as MORE. The P2 will read the
bit as LTINT and write it as MORE.
I
New bit: BPE (bit 23), Bus Parity Error. This bit is
only active, if 32-bit software structures are used
for the descriptor ring entries (SWSTYLE = ONE,
TWO or THREE) and if APERREN (BCR20, bit 10)
is set to ONE. Was reserved location, read and
written as ZERO.
相關(guān)PDF資料
PDF描述
AM79C970AKC PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
AM79C970A PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
AM79C970AVCW PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
AM79C970 PCnetTM-PCI Single-Chip Ethernet Controller for PCI Local Bus
AM79C971VCW PCnet⑩-FAST Single-Chip Full-Duplex 10/100 Mbps Ethernet Controller for PCI Local Bus
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AM79C970AVC 制造商:Advanced Micro Devices 功能描述:
AM79C970AVC\\W 制造商:Advanced Micro Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述:
AM79C970AVC\W 制造商:Advanced Micro Devices 功能描述: 制造商:Rochester Electronics LLC 功能描述: 制造商:AMD 功能描述:
AM79C970AVC-G 制造商:Rochester Electronics LLC 功能描述:
AM79C970AVCW 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
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