10h–1Fh Register Map Detailed Description
BCM5718 Programmer’s Guide
Broadcom
®
January 29, 2016 • 5718-PG108-R
Page 532
1Ch: Misc 1000-X Control 2 Register (Shadow Register Selector =
“16h”)
Bit
Name
RW
Description
Default
15
WRITE ENABLE
WO
1 = write bits [9:7] if [6] = 1 or
write bits[5:0] if [6] = 0
0 = read bits [9:0]
Read will always return 0.
0
14:10 SHADOW REGISTER
SELECTOR
RW
Shadow Register Selector
NOTE:
(If bit 8 of this register is set prior to writing this
register, then the selector value written will not
be stored.
To properly read the shadow registers, one must
write bit 8 as a zero, then on a subsequent write
set the desired shadow register to read.
10110
9
REMOTE COPPER MODE
(register 1c shadow 1fh
bits 2:1 must be “11”)
RW
1 = enable remote copper mode (used in
backplane applications to attach a remote phy
to a mac).
0 = normal operation
00
8
ENABLE REMOTE
ACCESS
RW
1 = Enable remote mac link partner to access
local MDIO registers via SerDes autoneg next-
page MDIO message pages. Bit [9] of this
register must also be set.
Local MDIO access is blocked. All local MDIO
read accesses will return the results of this
register regardless of register address. The only
local MDIO write access allowed is [9:7] of this
register.
0 = normal operation
00
7
RESTART SERDES
AUTONEG
RW
SC
On Writes:
1 = restart SerDes auto-negotiation. Bit [9] of
this register must also be set.
0 = normal operation
On Reads:
1 = “GBIC mode” (reg 1ch shadow 1f [2:1] =
“11”) and “remote copper mode” ([9] of this
register = 1)
0
6
REGISTER WRITE
SELECTOR
RW
On Writes:
1 = write bits [9:7] when bit [15] is also set during
a write cycle
0 = write bits [5:0] when bit [15] is also set during
a write cycle
On Reads:
1 = “SerDes link” (reg 1ch shadow 15h[9] = 1)
and “remote_copper_mode” ([9] of this register
= 1)
0