AM79C985KCW AMD [Advanced Micro Devices], AM79C985KCW Datasheet - Page 27

• Manufacturer Part Number: AM79C985KCW
• Manufacturer: AMD [Advanced Micro Devices]

TP Port Disable
SI Data
SO Data (Pri)
SO Data (Sec)
This command disables the TP port designated by the
three least-significant bits of the command byte. Sub-
sequently the eIMR+ chip will ignore all inputs to the
designated port and will not transmit a DAT or JAM pat-
tern on that port. Disabling the TP port also sets the
partitioning state machine of that port to the idle state.
Therefore, a partitioned port can be reconnected by first
disabling the port and then enabling it. Designated port
values of b111 through b100 in the command byte cor-
respond to TP7 through TP4 in the primary eIMR+ de-
vice. Designated port values of b011 through b000 in
the command byte correspond to TP3 through TP0 in
the secondary eIMR+ device.
TP Port Enable
SI Data
SO Data (Pri)
SO Data (Sec)
This command enables the TP port designated by the
three least-significant bits of the command byte. Desig-
nated port values of b111 through b100 in the command
byte correspond to TP7 through TP4 in the primary
eIMR+ device. Designated port values of b011 through
b000 in the command byte correspond to TP3 through
TP0 in the secondary eIMR+ device.
Disable Link Test Function (per TP port)
SI Data
SO Data (Pri)
SO Data (Sec)
This command disables the Link test function of the TP
port designated by the three least-significant bits of the
command data. As a consequence of this, the port will
no longer be disconnected if it fails the Link Test. If a
port has the Link Test disabled, reading the Link Test
Status indicates a ‘Link Pass’. Designated port values
of b111 through b100 in the command byte correspond
to TP7 through TP4 in the primary eIMR+ device. Des-
ignated port values of b011 through b000 in the com-
mand data correspond to TP3 through TP0 in the
secondary eIMR+ device.
Enable Link Test Function (per TP port)
SI Data
SO Data (Pri)
SO Data (Sec)
This command enables the Link test function of the TP
port designated by the three least-significant bits of the
command data. As a consequence of this, the port is
disconnected if it fails the Link Test. Designated port
values of b111 through b100 in the command byte cor-
respond to TP7 through TP4 in the primary
0010 0###
None
None
0011 0###
None
None
0100 0###
None
None
0101 0###
None
None
P R E L I M I N A R Y
Am79C985
eIMR+ device. Designated port values of b011 through
b000 in the command data correspond to TP3 through
TP0 in the secondary eIMR+ device.
Disable Link Pulse (Per TP Port)
SI Data
SO Data (Pri)
SO Data (Sec)
This command disables the transmission of the Link
pulse on the TP port designated by the three least-sig-
nificant bits of the command byte. Designated port val-
ues of b111 through b100 in the command byte
correspond to TP7 through TP4 in the primary eIMR+
device. Designated port values of b011 through b000 in
the command data correspond to TP3 through TP0 in
the secondary eIMR+ device.
Enable Link Pulse (Per TP Port)
SI Data
SO Data (Pri)
SO Data (Sec)
This command enables the transmission of the Link
pulse on the TP port designated by the three least-sig-
nificant bits of the command byte. Designated port val-
ues of b111 through b100 in the command byte
correspond to TP7 through TP4 in the primary eIMR+
device. Designated port values of b011 through b000 in
the command byte correspond to TP3 through TP0 in
the secondary eIMR+ device.
Disable Automatic Receiver Polarity Reversal (Per TP
Port)
SI Data
SO Data (Pri)
SO Data (Sec)
This command disables the Automatic Receiver Polar-
ity Reversal function for the TP port designated by the
three least-significant bits in the command byte. If this
function is disabled on a TP port receiving with reversed
polarity (due to a wiring error), the TP port will fail the
Link Test due to the incorrect polarity of the received
Link pulses. Designated port values of b111 through
b100 in the command byte correspond to TP7 through
TP4 in the primary eIMR+ device. Designated port val-
ues of b011 through b000 in the command byte corre-
spond to TP3 through TP0 in the secondary eIMR+
device.
The state of Automatic Polarity Reversal function is set
by SI on reset. If SI is HIGH at the rising edge of RST,
the eIMR+ device disables Automatic Polarity Reversal.
If SI is LOW at the rising edge of RST, the eIMR+ device
enables Automatic Polarity Reversal.
0100 1###
None
None
0101 1###
None
None
0110 0###
None
None
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