14
HDR-60 Base Board – Revision B
provide a legacy Ethernet coaxial link using the BNC connector (J11) by removing three resistors off the HDR-60
Base Board and then add back on three resistors as shown in Table 14. However, Ethernet-over-BNC is an unsup-
ported feature on this board. The BNC connector and Delta filter (U8) are unpopulated on most production runs of
this board. This information is provided as a reference only.
Table 14. Ethernet Connection at J11 or J12
Connector
Cable
LAN Speed
PCB Configuration
J12 (RJ45)
Cat5
10/100/1000Base-T
R31, R32 = 0 ohms
R23 = 4.7K ohms
R29, R30, R21 = open
J11 (BNC)
Coaxial
10/100Base-T
R29, R30 = 0 ohms
R21 = 4.7K ohms
R31, R32, R23 = open
1
Refer to the HDR-60 Base Board schematic in Appendix A and the Broadcom BCM54810 Data Sheet for detailed
information about the operation of the Ethernet PHY interface on this device. Refer to Table 15 for a description of
the Ethernet PHY GMII connections to the LatticeECP3.
1. J11 (BNC) and U8 (Delta filter) are unpopulated on most manufacturing runs of this board. Ethernet-over-BNC is an
unsupported feature of this board. The information in this table is for reference only.
Table 15. LatticeECP3 Interface to Ethernet PHY
Signal Name
LatticeECP3 I/O Pin (U2)
sysIO Bank
BCM54810 Pin (U3)
PHY_A0
E3
7
H10
PHY_A1
D4
7
J10
PHY_A2
E5
7
J9
PHY_A3
E4
7
K10
PHY_A4
B2
7
K9
GTXCLK
F5
7
A7
ECP3_GSRN
F4
7
--
PHY_LOWPWR
G4
7
F5
MDC
G5
7
E3
TXD0
B1
7
C7
TXD1
G3
7
C8
TXD2
H6
7
B6
TXD3
C1
7
B7
TXD4
H4
7
B8
TXD5
E2
7
B9
TXD6
F3
7
B10
TXD7
H5
7
A10
TX_EN
J4
7
A8
TX_ER
G2
7
A9
CRS
F1
7
E5
COL
H2
7
D5
RESETN
G1
7
E4
RXD0
J1
7
D4
RXD1
K6
7
D3
RXD2
J7
7
C3
RXD3
J3
7
C4
RXD4
J6
7
C5
