Spartan-3A DSP 3400A Edition User Guide
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19
UG498 (v2.2) November 17, 2008
Spartan-3A DSP 3400A Edition Board Hardware
R
7.
Board Flash PROM
Xilinx XCF32P. This flash PROM is used to program the development board FPGA.
The flash PROM can hold up to two distinct configuration images (up to four
compressed configuration images) that can be accessed through the configuration DIP
switches. Requires that you use the same configuration DIP switches to configure the
FPGA from the platform flash PROM. See
“33. Configuration DIP Switches”
for
detailed information.
8.
Ethernet PHY
Marvell Alaska 88E1111 PHY device. This PHY supports 10Base-T, 100Base-TX, and
1000Base-T (Gigabit) Ethernet. The PHY is connected to the board's Ethernet connector
(
“9. Ethernet Port”
). The Ethernet PHY is initialized under its default configuration
when the development board is turned on or reset. Jumper JP2 selects whether the
PHY's default is RGMII mode (pins 2-3) or GMII mode (pins 1-2).
Table 1-4
defines the
default configuration of the Ethernet PHY, which can be modified through software.
Table 1-5
identifies the FPGA pin assignments for building new FPGA files.
Table 1-4:
Default Ethernet PHY Configuration
Configuration Pin
Board Connection
Bit 2
Bit 1
Bit 0
CONFIG0
V
cc
2.5 V
PHYADR[2] = 1
PHYADR[1] = 1
PHYADR[0] = 1
CONFIG1
Ground
ENA_PAUSE = 0
PHYADR[4] = 0
PHYADR[3] = 0
CONFIG2
V
cc
2.5 V
ANEG[3] = 1
ANEG[2] = 1
ANEG[1] = 1
CONFIG3
V
cc
2.5 V
ANEG[0] = 1
ENA_XC = 1
DIS_125 = 1
CONFIG4
V
cc
2.5 V or
LED_DUPLEX
HCWCFG_MODE
[2] = 0 or 1
HCWCFG_MODE
[1] = 1
HCWCFG_MODE
[0] = 1
CONFIG5
V
cc
2.5 V
DIS_FC = 1
DIS_SLEEP = 1
HCWCFG_MODE
[3] = 1
CONFIG6
LED_RX
SEL_BDT = 0
INT_POL = 1
50/75 ohm = 0
(50 ohm termination)
Table 1-5:
Ethernet Interface Pin Assignments
FPGA Pin
Description
FPGA Pin
Description
AB13
PHY_COL
AA14
PHY_RX_CLK
AC10
PHY_CRS
AC13
PHY_RX_ER
AC6
PHY_INT
AE17
PHY_TXCTL_TXEN
AE4
PHY_MDC
W13
PHY_TXC_GTXCLK
AD6
PHY_MDIO
V12
PHY_TXD_0
AE9
PHY_RESET_N AB9
PHY_TXD_1
AC17
PHY_RXCTL_RXDV
W12
PHY_TXD_2
AF17
PHY_RXD_0
AC9
PHY_TXD_3
AD9
PHY_RXD_1
AA12
PHY_TXD_4
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