AM79C985JC datasheet(27/48 Pages) AMD

27 / 48 page

Am79C985

PRELIMINARY

TP Port Disable

SI Data

0010 0###

SO Data (Pri)

None

SO Data (Sec)

None

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

0011 0###

SO Data (Pri)

None

SO Data (Sec)

None

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

0100 0###

SO Data (Pri)

None

SO Data (Sec)

None

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

0101 0###

SO Data (Pri)

None

SO Data (Sec)

None

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

TP7

through

TP4

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.

Disable Link Pulse (Per TP Port)

SI Data

0100 1###

SO Data (Pri)

None

SO Data (Sec)

None

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

0101 1###

SO Data (Pri)

None

SO Data (Sec)

None

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

0110 0###

SO Data (Pri)

None

SO Data (Sec)

None

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.

AM79C985JC Datasheet(PDF) 27 Page - Advanced Micro Devices

AM79C985JC Datasheet(HTML) 27 Page - Advanced Micro Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

Datasheet Descarga

Enlace URL