SmartWAV2-MidiMode_R4

SMARTWAV 2
MIDI Mode
Vizic Technologies ©2020 | 15
The MIDI(opto-isolated) to TTL(0V-3.3V) converter is a simple circuit just
to convert the electrical current signals from the MIDI loop to the
standard voltage TTL signals of the serial protocol.
The design of the SmartWAV2+MIDI Adapter is fully based on the
electrical connections presented in this section, the adapter does
integrate the MIDI to serial TTL adapter, the 3.3V power management
and the audio outputs, therefore this section can be skipped if a
SmartWAV2+MIDI Adapter is being used.
4.2- MIDI Serial Mode 4 Hardware Channel Selection:
The MIDI channel selection is via the I0-I3 input pins, those pins can be
directly connected to VCC or GND, or using 2-way switches, 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 (tied to VCC) it overrides the I0-I3
input pins, and therefore it accepts commands from all 16 MIDI
channels.
SmartWAV2 MIDI Channel Selection:
Channel #
I3/I8 BCK Pin
I2/I7 NXT Pin
I1/I6 P-P Pin
I0/I5 Loop Pin
Channel 1
GND
GND
GND
GND
Channel 2
GND
GND
GND
VCC
Channel 3
GND
GND
VCC
GND
Channel 4
GND
GND
VCC
VCC
Channel 5
GND
VCC
GND
GND
Channel 6
GND
VCC
GND
VCC
Channel 7
GND
VCC
VCC
GND
Channel 8
GND
VCC
VCC
VCC
Channel 9
VCC
GND
GND
GND
Channel 10
VCC
GND
GND
VCC
Channel 11
VCC
GND
VCC
GND
Channel 12
VCC
GND
VCC
VCC
Channel 13
VCC
VCC
GND
GND
Channel 14
VCC
VCC
GND
VCC
Channel 15
VCC
VCC
VCC
GND
Channel 16
VCC
VCC
VCC
VCC