10h–1Fh Register Map Detailed DescriptionBCM5718 Programmer’s Guide
Broadcom®
January 29, 2016 • 5718-PG108-R Page 539
1Ch: Auxiliary 1000-X Status Register (Shadow Register Selector =
“1ch”)
1 FIFO ELASTICITY [0] for
dig1000x_tx_fifo and
dig1000x_rx_fifo
Modes:
(RGMII/GMII 1000x
towards SerDes link
partner)
(RGMII to SGMII-slave 10/
100/ 1000 towards SerDes
link partner)
(10/100 SGMII transmit
and receive)
(1000 SGMII transmit from
copper link partner towards
SerDes link partner)
FIFO ELASTICITY [0] for
dig1000x_tx_fifo and
dig1000x_rx_fifo (1000-X
PCS transmit, 10/100
SGMII transmit and
receive, 1000 SGMII
transmit from copper link
partner towards SerDes
MAC)
RW dig1000x_tx_fifo and dig1000x_rx_fifo
FIFO ELASTICITY [1:0]:
11 = support 20k byte packets
10 = support 15k byte packets
01 = support 10k byte packets
00 = support 5k byte packets (w/200 ppm offset)
MSB located at a register 1ch shadow 16h [0]
0
0 DISABLE CRC
CHECKER
RW 1 = disable crc checker (clock gated-off to save
power)
0 = enable crc checker
1
Bit Name RW Description Default
15 WRITE ENABLE RW 1 = write bits [9:0]
0 = read bits [9:0]
0
14:10 SHADOW REGISTER
SELECTOR
RW Shadow Register Selector 11100
9 SERDES LINK STATUS
CHANGE
RO
LH
1 = link status change has occurred since last
read
0 = link status change has not occurred since
last read
0
8 SGMII SELECTOR
MISMATCH
RO 1 = SGMII selector mismatch in SGMII mode
0 = Fiber, copper, GBIC mode, or SGMII
selector does not mismatch, or autoneg
disabled
0
Bit Name RW Description Default
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