Firmware-73 Format

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The USB-microDig MIDI implementation uses the following data format for all system exclusive messages:

Byte Description
240 (F0h) System Exclusive Status
125 (7Dh) Manufacturer ID
{DEV} Device ID
{CMD} Command or Message ID
[BODY] Main Data
247 (F7h) End of System Exclusive


Manufacturer ID

The Manufacturer ID identifies the manufacturer of a MIDI device. Infusion Systems uses the number 125 (7Dh). Infusion Systems does not own the manufacturer ID 125 (7Dh). This ID is usually reserved for general educational and/or research equipment. Please ensure that you do not have any devices with manufacturer ID 125 (7Dh) in your MIDI chain.


Device ID

The Device ID identifies a specific USB-microDig in setups with multiple USB-microDigs. This setting should remain 0 for use of the USB-microDig in stand-alone mode. Host mode allows for device IDs other than 0.


Command and Message IDs and [Main Data]

The Command and Message IDs and [Main Data] form the protocol for communication with the USB-microDig. The protocol consists of commands that are sent to the USB-microDig and messages that are sent by the USB-microDig.