IDT 89HPES48T12G2, User Manual

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IDT Switch Configuration and Status Registers
PES48T12G2 User Manual 16 - 12 April 5, 2013
S[13:12, 9:0]RXEQLCTL - SerDes x Receiver Equalization Lane Control
General Purpose I/O Registers
GPIOFUNC0 - General Purpose I/O Function 0 (0x0A90)
Bit
Field
Field
Name
Type
Default
Value
Description
2:0 RXEQZ RW 0x1
SWSticky
Receiver Equalization Zero. Amplifies the high-frequency gain of
the equalizer. A value of 0x0 results in the smallest amount of high
frequency gain. A value of 0x7 results in the highest amount of
high frequency gain. Together with the other fields in this register,
the default value corresponds to a long, lossy channel.
Setting both RXEQZ and RXEQB to zero results in turning off
receiver equalization completely.
Refer to section Receiver Equalization Controls on page 7-15 for
further information of Receiver Equalization.
This field controls the receiver equalization for the lane(s) selected
by the Lane Select (LANESEL) field in the SerDes Control
(S[x]CTL) register. This value is SWSticky for all lanes (i.e., even
those not selected by the LANESEL field in the S[x]CTL register).
5:3 RXEQB RW 0x7
SWSticky
Receive Equalization Boost. Reduces the low-frequency gain of
the equalizer. A value of 0x0 results in the largest low frequency
gain and smallest amount of boost. A value of 0x7 results in the
smallest low frequency gain and largest amount of boost. Together
with the other fields in this register, the default value corresponds
to a long, lossy channel.
Setting both RXEQZ and RXEQB to zero results in turning off
receiver equalization completely.
Refer to section Receiver Equalization Controls on page 7-15 for
further information of Receiver Equalization.
This field controls the receiver equalization for the lane(s) selected
by the Lane Select (LANESEL) field in the SerDes Control
(S[x]CTL0) register. This value is SWSticky for all lanes (i.e., even
those not selected by the LANESEL field in the S[x]CTL0 register).
31:6 Reserved RO 0x0 Reserved field.
Bit
Field
Field
Name
Type
Default
Value
Description
31:0 GPIOFUNC RW 0x0
SWSticky
GPIO Function. Each bit in this field controls the corresponding
GPIO pin. When set, the corresponding GPIO pin operates as the
selected alternate function. When a bit is cleared, the correspond-
ing GPIO pin operates as a general purpose I/O pin.
Bit x in this field corresponds to GPIO pin x.