參數(shù)資料
型號(hào)： AM79C972BKCW
廠商： ADVANCED MICRO DEVICES INC
元件分類(lèi)： 微控制器/微處理器
英文描述： PCnet⑩-FAST+ Enhanced 10/100 Mbps PCI Ethernet Controller with OnNow Support
中文描述： 5 CHANNEL(S), 100M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16
封裝： PLASTIC, QFP-160
文件頁(yè)數(shù)： 114/130頁(yè)
文件大小： 1580K
代理商： AM79C972BKCW
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114
Am79C972
Read/Write accessible always.
LTINTEN
is
H_RESET or S_RESET and is
unaffected by STOP.
cleared
by
13-12
RES
Reserved locations. Written as
zeros and read as undefined.
11
SINT
System Interrupt is set by the
Am79C972 controller when it de-
tects a system error during a bus
master transfer on the PCI bus.
System errors are data parity er-
ror, master abort, or a target
abort. The setting of SINT due to
data parity error is not dependent
on the setting of PERREN (PCI
Command register, bit 6).
When SINT is set, INTA is assert-
ed if the enable bit SINTE is 1.
Note that the assertion of an in-
terrupt due to SINT is not depen-
dent on the state of the INEA bit,
since INEA is cleared by the
STOP reset generated by the
system error.
Read/Write accessible always.
SINT is cleared by the host by
writing a 1. Writing a 0 has no ef-
fect. The state of SINT is not af-
fected by clearing any of the PCI
Status register bits that get set
when
a
data
(DATAPERR, bit 8), master abort
(RMABORT, bit 13), or target
abort (RTABORT, bit 12) occurs.
SINT is cleared by H_RESET or
S_RESET and is not affected by
setting the STOP bit.
parity
error
10
SINTE
System Interrupt Enable. If SIN-
TE is set, the SINT bit will be able
to set the INTR bit.
Read/Write accessible always.
SINTE is set to 0 by H_RESET or
S_RESET and is not affected by
setting the STOP bit.
9-8
RES
Reserved locations. Written as
zeros and read as undefined.
7
EXDINT
Excessive Deferral Interrupt is
set by the Am79C972 controller
when the transmitter has experi-
enced Excessive Deferral on a
transmit frame, where Excessive
Deferral is defined in the ISO
8802-3 (IEEE/ANSI 802.3) stan-
dard.
When EXDINT is set, INTA is as-
serted if the enable bit EXDINTE
is 1.
Read/Write accessible always.
EXDINT is cleared by the host by
writing a 1. Writing a 0 has no ef-
fect. EXDINT is cleared by
H_RESET and is not affected by
S_RESET or setting the STOP
bit.
6
EXDINTE
Excessive Deferral Interrupt En-
able. If EXDINTE is set, the
EXDINT bit will be able to set the
INTR bit.
Read/Write accessible always.
EXDINTE is set to 0 by
H_RESET and is not affected by
S_RESET or setting the STOP
bit.
5
MPPLBA
Magic Packet Physical Logical
Broadcast Accept. If MPPLBA is
at its default value of 0, the
Am79C972 controller will only de-
tect a Magic Packet frame if the
destination address of the packet
matches the content of the physi-
cal address register (PADR). If
MPPLBA is set to 1, the destina-
tion address of the Magic Packet
frame can be unicast, multicast,
or broadcast. Note that the set-
ting of MPPLBA only affects the
address detection of the Magic
Packet frame. The Magic Packet
frame
’
s data sequence must be
made up of 16 consecutive phys-
ical addresses (PADR[47:0]) re-
gardless
of
what
destination address it has. This
bit is OR
’
ed with EMPPLBA bit
(CSR116, bit 6).
kind
of
Read/Write accessible always.
MPPLBA is set to 0 by H_RESET
or S_RESET and is not affected
by setting the STOP bit.
4
MPINT
Magic Packet Interrupt. Magic
Packet Interrupt is set by the
Am79C972 controller when the
device is in the Magic Packet
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