HW-SD3400A-DSP-DB-UNI-G【PDF 19/50 页】KIT DEVELOPMENT SPARTAN 3ADSP

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Spartan-3A DSP 3400A Edition Board Hardware

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

CONFIG0

CONFIG1

CONFIG2

CONFIG3

CONFIG4

CONFIG5

Board Connection

V cc 2.5 V

Ground

V cc 2.5 V

V cc 2.5 V

V cc 2.5 V or

LED_DUPLEX

V cc 2.5 V

Bit 2

PHYADR[2] = 1

ENA_PAUSE = 0

ANEG[3] = 1

ANEG[0] = 1

HCWCFG_MODE

[2] = 0 or 1

DIS_FC = 1

Bit 1

PHYADR[1] = 1

PHYADR[4] = 0

ANEG[2] = 1

ENA_XC = 1

HCWCFG_MODE

[1] = 1

DIS_SLEEP = 1

Bit 0

PHYADR[0] = 1

PHYADR[3] = 0

ANEG[1] = 1

DIS_125 = 1

HCWCFG_MODE

[0] = 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

AB13

AC10

AC6

AE4

AD6

AE9

AC17

AF17

AD9

Description

PHY_COL

PHY_CRS

PHY_INT

PHY_MDC

PHY_MDIO

PHY_RESET_N

PHY_RXCTL_RXDV

PHY_RXD_0

PHY_RXD_1

FPGA Pin

AA14

AC13

AE17

W13

V12

AB9

W12

AC9

AA12

Description

PHY_RX_CLK

PHY_RX_ER

PHY_TXCTL_TXEN

PHY_TXC_GTXCLK

PHY_TXD_0

PHY_TXD_1

PHY_TXD_2

PHY_TXD_3

PHY_TXD_4

Spartan-3A DSP 3400A Edition User Guide

UG498 (v2.2) November 17, 2008

19

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