Modifying the Hitachi US7750 HARP (Aspen) SDB Switches and Jumpers

You need to modify the switches and jumpers on the Hitachi US7750 HARP (Aspen) SDB to write to flash memory and execute the boot loader code.

To modify the Hitachi US7750 HARP (Aspen) SDB switches and jumpers

Verify that the switches are in the correct On or Off position.

The following table shows the functionality of switch S1. To write to flash memory, S1-switch 3 needs to be in the Off position.

S1-1	S1-2	S1-3	S1-4	Function
On	Off	Off	On	Code executes from boot monitor after reset.
Off	Off	Off	On	Code executes from flash memory after reset.
Off	Off	Off	Off	The Ethernet boot loader executes to download the new image after reset.
X	X	Off	X	Flash memory is not write-protected.
X	X	On	X	Flash memory is write-protected.

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