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參數(shù)資料
| 型號： | AM79C965KCW |
| 廠商： | ADVANCED MICRO DEVICES INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 3 CHANNEL(S), LOCAL AREA NETWORK CONTROLLER, PQFP16 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁數(shù)： | 62/220頁 |
| 文件大?。?/td> | 1197K |
| 代理商： | AM79C965KCW |
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AMD
P R E L I M I N A R Y
154
Am79C965
stretcher enabled (PSE = 1) and
is fully programmable.
The
default
setting
after
H_RESET for the LED1 register
is 0084h. The LED1 register
value is unaffected by S_RESET
or STOP.
31-16
RES
Reserved locations. Written as
zeros and read as undefined.
15
LEDOUT
This bit indicates the current
(non-stretched) value of the LED
output pin. A value of ONE in this
bit indicates that the OR of the
enabled signals is true.
The logical value of the LEDOUT
status signal is determined by the
settings of the individual Status
Enable bits of the LED register
(Bits 6-0).
This bit is READ only by the host,
and is unaffected by H_RESET
S_RESET or STOP.
This bit is valid only if the network
link status is PASS.
14
LEDPOL
LED Polarity. When this bit has
the value ZERO, then the LED
pin will be driven to a LOW level
whenever the OR of the enabled
signals is true and the LED pin
will be floated and allowed to float
high whenever the OR of the en-
abled signals is false (i.e. the
LED output will be an Open Drain
output and the output value will
be the inverse of the LEDOUT
status bit).
When this bit has the value ONE,
then the LED pin will be driven to
a HIGH level whenever the OR of
the enabled signals is true and
the LED pin will be driven to a
LOW level whenever the OR of
the enabled signals is false (i.e.
the LED output will be a Totem
Pole output and the output value
will be the same polarity as the
LEDOUT status bit).
The setting of this bit will not af-
fect the polarity of the LEDOUT
bit for this register.
13
LEDDIS
LED Disable. This bit is used to
disable the LED output. When
LEDDIS has the value ONE, then
the LED output will always be
floated. When LEDDIS has the
value ZERO, then the LED out-
put
value
will
be
governed
by the LEDOUT and LEDPOL
values.
12-8
RES
Reserved locations. Write as ZE-
ROs, read as undefined.
7
PSE
Pulse Stretcher Enable. Extends
the LED illumination time for
each new occurrence of the en-
abled function for this LED out-
put.
A value of 0 disables the function.
A value of 1 enables the function.
6
LNKSTE
Link Status Enable. Indicates the
current link status on the Twisted
Pair interface. When this bit is
set, a value of ONE will be
passed to the LEDOUT signal to
indicate that the link status state
is PASS. A value of ZERO will be
passed to the LEDOUT signal to
indicate that the link status state
is FAIL.
A value of 0 disables the signal. A
value of 1 enables the signal.
5
RCVME
Receive Match status Enable. In-
dicates receive activity on the
network that has passed the ad-
dress match function for this
node.
All
address
matching
modes are included: Physical,
Logical filtering, Promiscuous,
Broadcast, and EADI.
A value of 0 disables the signal. A
value of 1 enables the signal.
4
XMTE
Transmit status Enable. Indi-
cates PCnet-32 controller trans-
mit activity.
A value of 0 disables the signal. A
value of 1 enables the signal.
3
RXPOLE
Receive Polarity status Enable.
Indicates the current Receive
Polarity condition on the Twisted
Pair interface. A value of ONE in-
dicates that the polarity of the
RXD
± pair has been reversed. A
value of ZERO indicates that the
polarity of the RXD
± pair has not
been reversed.
Receive polarity indication is
valid only if the LNKST bit of
BCR4
indicates
link
PASS
status.
A value of 0 disables the signal. A
value of 1 enables the signal.
2
RCVE
Receive status Enable. Indicates
receive activity on the network.
A value of 0 disables the signal. A
value of 1 enables the signal.
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