SmartWAV2-Datasheet_R4

SMARTWAV 2

Datasheet

3.5- Polyphonic Slave Serial Mode 4 - Midi Serial: In this mode the

SmartWAV2 can be controlled by standard musical instrument digital

interface(midi) commands, this mode offers 14-channel polyphonic

audio tracks that can be triggered by a midi host. Audio related

functions (Refer to document SmartWAV2-MIDI.pdf) are controlled by

receiving simple midi commands.

Midi channel selection is via the I0-I3 input pins, this allow a logical

binary selection of channel 0(0000b) to 15(1111b), however inside the

processor this is handled as channel: n+1, resulting in a 1 to 16 channel

selection. The STP pin acts as a midi omni-channel enable/disable pin,

when enabled it overrides the I0-I3 pins channel selection.

To receive midi commands the SmartWAV 2 uses it RX pin (midi in),

midi protocol works on a standard serial protocol (31250bps, 8bit,

1stop, no parity), however the hardware interface of a standard serial

TTL USART/UART device is different from the hardware interface of

midi(opto-isolated), in order to connect a midi out device to

SmartWAV 2 RX pin(midi in), a midi to serial TTL(0V-3.3V) converter is

required:

Midi to Serial TTL converter.

The midi(opto-isolated) to TTL(0V-3.3V) converter is a simple circuit just

to convert the electrical signals of the serial protocol.