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Change description of use of LAN9500
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hardware/raspberrypi/bootmodes/bootflow.md

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@@ -23,11 +23,11 @@ Next the boot ROM checks each of the boot sources for a file called bootcode.bin
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* Device found:
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* If device type == hub
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* Recurse for each port
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* If device type == (mass storage or LAN9500)
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* If device type == (mass storage or LAN951x)
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* Store in list of devices
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* Recurse through each MSD
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* If bootcode.bin found boot
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* Recurse through each LAN9500
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* Recurse through each LAN951x
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* DHCP / TFTP boot
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* else (Device mode boot)
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* Enable device mode and wait for host PC to enumerate
@@ -41,6 +41,7 @@ NOTES:
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* MSD takes precedence over Ethernet boot.
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* It is no longer necessary for the first partition to be the FAT partition, as the MSD boot will continue to search for a FAT partition beyond the first one.
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* The boot ROM also now supports GUID partitioning and has been tested with hard drives partitioned using Mac, Windows, and Linux.
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* The LAN951x is detected using the Vendor ID 0x0424 and Product ID 0xec00, this is different to the standalone LAN9500 device which has a product ID of 0x9500 or 0x9e00. To use the standalone LAN9500 an I2C EEPROM would need to be added to change these ID's to match the LAN9514
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The primary SD card boot mode is, as standard, set to be GPIOs 49-53. It is possible to boot from the secondary SD card on a second set of pins, i.e. to add a secondary SD card to the GPIO pins. However, we have not yet enabled this ability.
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