Detailed Description

ML605 Flash Boot Options

The ML605 has two parallel wired flash memory devices as shown in Figure 1-3. At ML605 power-up, before FPGA configuration, DIP switch S2 switch 2 selects which flash device, U4 (BPI) or U27 (Platform Flash), provides the boot bitstream. Typically S2 switch 2 will be open/OFF to select the U27 Platform Flash. Given that the mode switches (S2 switch 3/M0, switch 4/M1 and switch 5/M2) are set to Slave SelectMAP mode, then U27, driven at 47 MHz, can load a PCIe core bitstream before a host PC motherboard can scan its PCIe slots.When S2 switch 2 is closed/ON at power up, the FPGA will be configured from the BPI flash device U4. Note that U4 address bit A23 is switched by S2 switch 6, which allows the lower or upper half of U4 to be chosen as a data source.

Table 1-5shows the connections and pin numbers for the boot flash devices.

Table 1-5:Platform Flash and BPI Flash Connections

U1 FPGA Pin

Schematic Net Name

U4 BPI Flash

U27 Platform Flash

 

 

 

 

Pin Number

Pin Name

Pin Number

Pin Name

 

 

 

 

 

 

 

 

AL8

FLASH_A0

29

A1

A1

A00

 

 

 

 

 

 

AK8

FLASH_A1

25

A2

B1

A01

 

 

 

 

 

 

AC9

FLASH_A2

24

A3

C1

A02

 

 

 

 

 

 

AD10

FLASH_A3

23

A4

D1

A03

 

 

 

 

 

 

C8

FLASH_A4

22

A5

D2

A04

 

 

 

 

 

 

B8

FLASH_A5

21

A6

A2

A05

 

 

 

 

 

 

E9

FLASH_A6

20

A7

C2

A06

 

 

 

 

 

 

E8

FLASH_A7

19

A8

A3

A07

 

 

 

 

 

 

A8

FLASH_A8

8

A9

B3

A08

 

 

 

 

 

 

A9

FLASH_A9

7

A10

C3

A09

 

 

 

 

 

 

D9

FLASH_A10

6

A11

D3

A10

 

 

 

 

 

 

C9

FLASH_A11

5

A12

C4

A11

 

 

 

 

 

 

D10

FLASH_A12

4

A13

A5

A12

 

 

 

 

 

 

C10

FLASH_A13

3

A14

B5

A13

 

 

 

 

 

 

F10

FLASH_A14

2

A15

C5

A14

 

 

 

 

 

 

F9

FLASH_A15

1

A16

D7

A15

 

 

 

 

 

 

AH8

FLASH_A16

55

A17

D8

A16

 

 

 

 

 

 

AG8

FLASH_A17

18

A18

A7

A17

 

 

 

 

 

 

AP9

FLASH_A18

17

A19

B7

A18

 

 

 

 

 

 

AN9

FLASH_A19

16

A20

C7

A19

 

 

 

 

 

 

AF10

FLASH_A20

11

A21

C8

A20

 

 

 

 

 

 

AF9

FLASH_A21

10

A22

A8

A21

 

 

 

 

 

 

AL9

FLASH_A22

9

A23

G1

A22

 

 

 

 

 

 

AA23

FLASH_A23

26

A24

NC

A23

 

 

 

 

 

 

ML605 Hardware User Guide

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21

UG534 (v1.2.1) January 21, 2010

 

 

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Xilinx manual ML605 Flash Boot Options