LAN966x Strapping Modes

All EVBs in the LAN966x family have a 4-way DIP switch which is used to control the boot mode. The location of the DIP switch varies, but it always has a silk print saying "Boot mode".

The boot mode is only sampled at boot time, which means that when changing the boot mode, the board needs to be reset.

The following table documents the relevant boot modes used by VelocityDRIVE-SP:

Strap Value DIP-Setting LAN966x (B0)

0001 (0x1)
dip 1

Default development boot mode for VelocityDRIVE-SP
Booting from SPI-NOR 25MHz mode 1-4-4
BootROM traces activated on FlexCOM-3 in UART mode 115200 1N8
VelocityDRIVE uses FlexCOM-3 in UART mode 115200 1N8.

0100 (0x4)
dip 4

Default boot mode for VelocityDRIVE-SP
Booting from SPI-NOR 25MHz mode 1-4-4
BootROM traces disabled.
VelocityDRIVE uses FlexCOM-3 in UART mode 115200 1N8.

1000 (0x8)
dip 8

De-brick mode.
Booting into ROM monitor using UART.
FlexCOM-3 in UART mode 115200 1N8.