am79c961 Advanced Micro Devices, am79c961 Datasheet - Page 94

• Manufacturer Part Number: am79c961
• Description: Pcnettm-isa Jumperless Single-chip Ethernet Controller For Isa
• Manufacturer: Advanced Micro Devices

1-568
3
2
1
0
ISACSR6: LED2 Status
Bit
15
14
AMD
RVPOL E
LEDOUT
LEDXOR
RCV E
COL E
JAB E
Name
0 disables the signal, 1 enables
the signal.
Enable Receive Polarity Signal.
Enables LED pin assertion when
receive polarity is correct on the
10BASE-T port. Clearing the bit
indicates this function is to
be ignored.
Enable Receive Status Signal.
Indicates receive activity on the
network.
0 disables the signal, 1 enables
the signal.
Enable Jabber Signal. Indicates
the PCnet-ISA
bering on the network.
0 disables the signal, 1 enables
the signal.
Enable Collision Signal. Indi-
cates collision activity on the
network.
0 disables the signal, 1 enables
the signal.
ISACSR6 controls the func-
tion(s)
displays. Multiple functions can
be simultaneously enabled on
this LED pin. The LED display will
indicate the logical OR of the en-
abled
defaults to twisted pair MAU Re-
ceive Polarity (RCVPOL) with
pulse stretcher enabled (PSE =
1) and is fully programmable.
Indicates
stretched) state of the function(s)
generated. Read only.
This bit when set causes LED2 to
be an active high signal when as-
serted. When this bit is cleared,
LED2 will be active low when
asserted.
( Note: This bit when used in con-
junction with the RVPOLE bit (Bit
3) of ISACSR5, ISACSR6, and
ISACSR7 can be used to create a
“Polarity Bad” LED .)
that
functions.
Description
the
+
the
controller is jab-
current
LED2
ISACSR6
P R E L I M I N A R Y
(non-
Am79C961
pin
13-8
7
6
5
4
3
2
1
0
RVPOLE
0
1
1
RCVADDM
RVPOL E
XMT E
RCV E
COL E
JAB E
RES
RES
PSE
LEDXOR
X
0
1
Reserved locations. Read and
written as zero.
Pulse Stretcher Enable. Extends
the LED illumination for each en-
abled function occurrence.
0 is disabled, 1 is enabled.
Reserved locations. Read and
written as zero.
Receive Address Match. This bit
when set allows for LED control
of only receive packets that
match internal address match.
Enable Transmit Status Signal.
Indicates PCnet-ISA
transmit activity .
0 disables the signal, 1 enables
the signal.
Enables LED pin assertion when
receive polarity is correct on the
10BASE-T port. Clearing the bit
indicates this function is to
be ignored.
Enable Receive Status Signal.
Indicates receive activity on the
network.
0 disables the signal, 1 enables
the signal.
Enable Jabber Signal. Indicates
the PCnet-ISA
bering on the network.
0 disables the signal, 1 enables
the signal.
Enable Collision Signal. Indi-
cates collision activity on the
network.
0 disables the signal, 1 enables
the signal.
Enable Receive Polarity Signal.
10BASE-T polarity function
ignored
LED1 pin low with “Good”
10BASE-T polarity (LED on)
LED1 pin high with “Good”
10BASE-T polarity (LED off)
Result
+
controller is jab-
+
controller