REL0.1
Page 45 of 95
Kintex Ult FPGA SOM Hardware User Guide
iWave Systems Technologies Pvt. Ltd.
2.8.1
LS1021A Interfaces
The interfaces which are supported in Board-to-Board Conenector2 from LS1021A Processor is explained in the following section.
2.8.1.1
Gigabit Ethernet Interface
The Kintex Ult FPGA SOM supports one 10/100/1000 Mbps Ethernet interface on Board-to-Board Connector2.The MAC is
integrated in the LS1021A Processor
and connected to the external Gigabit Ethernet PHY “
KSZ9031RNXIC
” on SOM. This Gigabit
Ethernet PHY is interfaced with Ethernet Controller 1 RGMII interface of LS1021A and works at 1.8V IO voltage level.
In Kintex Ult FPGA SOM, LS1021A
GPIO “
LS_ETH_RSTN_GPIO4_23(SDHC_DAT4)
” is used for Ethernet PHY reset. Also, SOM
supports Ethernet PHY interrupt through LS1021A
GPIO “
LS_ETH_INT_GPIO1_25(IRQ5)
”. This PHY supports active high Link and
Activity LED indication signals and available on Board-to-Board Connector2. Since MAC and PHY are supported on SOM itself, only
Magjack is required on the carrier board.
In Kintex Ult FPGA SOM, Ethernet PHY Address is fixed to 001 as per below table.
PHYADDRESS2
PHYADDRESS1
PHYADDRESS0
Ethernet PHY Address
PHYAD2
GPHY_LINK_LED2
GPHY_ACTIVITY_LED1
1
0(PD)
0(PD)
1(PU)
Important Note: GPHY_ACTIVITY_LED1 signal is muxed with PHYADDRESS2 pin. The same GPHY_ACTIVITY_LED1 signal is connected
to 60
th
pin of Board to Board connector2 to support Gigabit Ethernet Activity LED.
For more details on Gigabit Ethernet Interface pinouts on Board-to-Board Connector2, refer the below table.
B2B-2
Pin No
B2B Connector2
Signal Name
FPGA Pin Name
FPGA
Bank
FPGA
Pin No
Signal Type/
Termination
Description
59
GPHY_ATXRXP
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 1
positive.
57
GPHY_ATXRXM
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 1
negative.
53
GPHY_BTXRXP
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 2
positive.
51
GPHY_BTXRXM
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 2
negative.
47
GPHY_CTXRXP
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 3
positive.
45
GPHY_CTXRXM
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 3
negative.
41
GPHY_DTXRXP
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 4
positive.
39
GPHY_DTXRXM
NA
NA
NA
IO, GBE
Gigabit Ethernet differential pair 4
negative.