
10. Registers > Lane Control Registers
CPS-1848 User Manual
422
June 2, 2014
Formal Status
This document is confidential and is subject to an NDA.
Integrated Device Technology
29:30
RX_RATE
These bits in conjunction with the PLL_DIV_SEL bit in the
register determine the receive rate of
the lane.
PLL_DIV_SEL = 0
0b00 = 1.25 Gbaud
0b01 = 2.5 Gbaud
0b1X = 5.0 Gbaud
PLL_DIV_SEL = 1
0b00 = Reserved
0b01 = 3.125 Gbaud
0b1X = 6.25 Gbaud
The default is configured with the value of the external SPD[1:0]
signals.
Note: It is a programming error to set the value of this field
differently from the value of TX_RATE.
Note: The initial value of this field is determined by the setting of
the SPD[1:0] external pins.
Note: Before changing this field value, see
for the correct procedure to follow.
RW
Undefined
31
LANE_DIS
Power down Lane n
0 = Lane n enabled (not powered down)
1 = Lane n is disabled
Note: Lane 0 of a port should only be disabled if all lanes of a port
are unused.
Note: Changing the state of the LANE_DIS bit will require a
re-initialization or reset. Before changing this field value, see
for the correct procedure to follow.
RW
0
(Continued)
Bits
Name
Description
Type
Reset
Value