AM79C873 Advanced Micro Devices, AM79C873 Datasheet - Page 28

• Manufacturer Part Number: AM79C873
• Description: NetPHY -1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support
• Manufacturer: Advanced Micro Devices

AMD Specified Configuration Register (DSCR) -
Register 16
28
16.5
16.4
16.3
16.2
16.1
16.0
Bit
FDXLED_MODE
LINKLED_CTL
Bit Name
SMRST
MFPSC
RLOUT
SLEEP
Default
0, RW
0, RW
0, RW
0, RW
0, RW
0, RW
P R E L I M I N A R Y
LINKLED Mode Select:
0= Link LED output configured to indicate link status only.
1= Link LED output configured to indicate traffic status: When the link
status is OK, the LED will be on. When the chip is in transmitting or
receiving, it flashes.
FDXLED Mode Select:
1= FDXLED output configured to indicate polarity in 10BASE-T mode.
0= FDXLED output configured to indicate Full DuplexFull Duplex mode
status for 10 Mbps and 100 Mbps operation.
Reset State Machine:
When this bit is set to 1, all state internal machines will be reset. This bit
will clear after reset is completed.
MF Preamble Suppression Control:
1= MF preamble suppression on.
0= MF preamble suppression off.
MII frame preamble suppression control bi.t
Sleep Mode:
Writing a 1 to this bit will cause NetPHY-1 device to enter Sleep mode and
power down all circuits except the oscillator and clock generator circuit. To
exit Sleep mode, write 0 to this bit position. The prior configuration will be
retained when the sleep state is terminated, but the state machine will be
reset.
Remote Loopout Control:
When this bit is set to 1, the received data will loop out to the transmit
channel. This is useful for bit error rate testing.
Am79C873
Description