AM79C978A AMD [Advanced Micro Devices], AM79C978A Datasheet - Page 149

• Manufacturer Part Number: AM79C978A
• Description: Single-Chip 1/10 Mbps PCI Home Networking Controller
• Manufacturer: AMD [Advanced Micro Devices]

7
6
5
4
PSE
LNKSE
RCVME
XMTE
Receive Match Status Enable.
operation being enabled, a val-
ue of 0 is passed to the LED-
OUT signal.
This bit is always read/write ac-
cessible. FDLSE is cleared by
H_RESET and is not affected
by S_RESET or setting the
STOP bit.
Pulse Stretcher Enable. When
this bit is set, the LED illumination
time is extended for each new oc-
currence of the enabled function
for this LED output. A value of 0
disables the pulse stretcher.
This bit is always read/write ac-
cessible. PSE is set to 1 by
H_RESET and is not affected
by S_RESET or setting the
STOP bit.
Link Status Enable. When this bit
is set, a value of 1 will be passed
to the LEDOUT bit in this register
in Link Pass state.
This bit is always read/write ac-
cessible. LNKSE is cleared by
H_RESET and is not affected
by S_RESET or setting the
STOP bit.
When this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is receive ac-
tivity on the network that has
passed the address match func-
tion for this node. All address
matching modes are included:
physical, logical filtering, broad-
cast, and promiscuous.
This bit is always read/write ac-
cessible. RCVME is cleared by
H_RESET and is not affected by
S_RESET or setting the STOP
bit.
Transmit Status Enable. When
this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is transmit
activity on the network.
This bit is always read/write ac-
cessible. XMTE is cleared by
Am79C978A
3
2
1
0
BCR6: LED2 Status
BCR6 controls the function(s) that the LED2 pin dis-
plays. Multiple functions can be simultaneously enabled
on this LED pin. The LED display will indicate the logical
OR of the enabled functions.
Note: When LEDPE (BCR2, bit 12) is set to 1, pro-
gramming of the LED2 Status register is enabled.
When LEDPE is cleared to 0, programming of the
LED2 register is disabled. Writes to those registers will
be ignored.
Note: Bits 15-0 in this register are programmable
through the EEPROM PREAD operation.
Bit
31-16 RES
15
POWER
RCVE
SPEED
COLE
LEDOUT
Name
Receive Status Enable. When
Reserved locations. Written as
This bit indicates the current
H_RESET and is not affected
by S_RESET or setting the
STOP bit.
Power. When this bit is set to 1,
the device is operating in HIGH
power mode.
this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is receive ac-
tivity on the network.
This bit is always read/write ac-
cessible. RCVE is set to 1 by
H_RESET and is not affected
by S_RESET or setting the
STOP bit.
Speed. When this bit is set to 1,
the device is operating in HIGH
speed mode.
Collision Status Enable. When
this bit is set, a value of 1 is
passed to the LEDOUT bit in this
register when there is collision
activity on the network.
This bit is always read/write ac-
cessible. COLE is cleared by
H_RESET and is not affected
by S_RESET or setting the
STOP bit.
zeros and read as undefined.
(non-stretched) value of the
LED output pin. A value of 1 in
Description
149