10. Registers > Lane Control Registers
CPS-1848 User Manual
442
June 2, 2014
Formal Status
This document is confidential and is subject to an NDA.
Integrated Device Technology
10.20.17 Broadcast Lane DFE 1 Register
A read of this register returns the last value written. Each port’s value may differ from this broadcast register. The per-port
version of this register is
.
Register Name: BCAST_LANE_DFE_1
Reset Value: 0x0000_0000
Register Offset: 0xFFFF18
Bits
0
1
2
3
4
5
6
7
00:07
Reserved
08:15
Reserved
UNUSED
RX_DFE_D
IS
TAP_OFFS
ET_SEL
TAP_4_SEL
16:23
TAP_3_SEL TAP_2_SEL TAP_1_SEL TAP_0_SEL
Reserved
24:31
Reserved
Bits
Name
Description
Type
Reset
Value
0:10
Reserved
Reserved
RO
0
11:12
UNUSED
Reserved
RW
0
13
RX_DFE_DIS
Revision B and later devices
1 = Disable RX DFE
Revision A device
1 = Enable RX DFE
Supported combinations include:
• RX_DFE_DIS = 1, TAP_x_SEL = 0: Received signal is not
modified by DFE and coefficient updates cannot be written to
the register fields.
• RX_DFE_DIS = 1, TAP_x_SEL = 1: Coefficients can be written
into registers but updates will have no effect on the received
signal when LANE_{0..47}_DFE_2.CFG_EN transitions from 0
to 1.
• RX_DFE_DIS = 0, TAP_x_SEL = 1: Coefficients can be written
into registers and updates will have an effect on the received
signal when LANE_{0..47}_DFE_2.CFG_EN transitions from 0
to 1.
RW
0
14
TAP_OFFSET_SE
L
1 = Enable register adjustment of TAP_OFFSET.
Note: It is a programming error if this bit is set to 0 when RX DFE
is enabled.
RW
0
15
TAP_4_SEL
1 = Enable register adjustment of Tap 4 DFE coefficient
Note: It is a programming error if this bit is set to 0 when RX DFE
is enabled.
RW
0