10. Registers > Lane Control Registers
CPS-1848 User Manual
433
June 2, 2014
Formal Status
This document is confidential and is subject to an NDA.
Integrated Device Technology
16:20
TAP_2_CFG
Tap 2 is the coefficient used to adjust the received signal based
on the value of the bit received 2 bits before the current bit.
• Most significant bit is a sign bit, with 1 meaning “positive” and 0
meaning “negative”
• Positive values range from 0b10000 (Positive 0) up to 0b11111
(+15)
• Negative values range from 0b01111 (-1) down to 0b00001
(-15)
• 0b00000 is undefined
RW
0b10000
21:26
TAP_1_CFG
Tap 1 is the coefficient used to adjust the received signal based
on the value of the bit received immediately before the current bit.
• Positive values range from 0b000000 (0) up to 0b011111 (+31)
• Values 0b100000–0b111111 are equivalent to +31.
RW
0b000000
27:30
TAP_0_CFG
Tap 0 is a Variable Gain Amplifier.
The values range from 0 up to +15.
RW
0b1000
31
CFG_EN
Load coefficient output values into DFE DACs based on “_CFG”
register fields when this field transitions from 0 to 1.
Note: The values of all taps are programmed into the DFE DACs
when this bit transitions from 0 to 1, regardless of the value of the
“_SEL” bits in the
. The DFE DACs
have no effect on the received signal if RX_DFE_DIS = 1 in the
same register.
RW
0
(Continued)
Bits
Name
Description
Type
Reset
Value