Home Chapter 6 Miditron and E-MU Midi Cable
Miditron and E-MU Midi Cable
Miditron, 9V Power cable and Midi E-MU X Midi Tab cable connected.
Notice the Input and Output of the Midi cable coming into the board via the MIDI OUT cable into the MIDI In zone on the Miditron board
and the MIDI IN cable into the location that says MIDI out on the Miditron board.
This is a bit anti intuitive though works.
Miditron cables with longer length USB cables are also available form M-AudioUno - 1-In/1-Out USB Bus-Powered MIDI Interface.
Midi is short for Musical Instrument Digital Interface and was developed over 25 years ago to simplify the the making of music
with keyboards, trigger pads, sound modules and control surfaces interfaced to the computer. Midi is now used widely in many fields
of research including robotics and control. 
On the other end of this cable Midi cable is the now common USB cable to connect to your computer.
Be sure to check your computer's USB specifications to confirm if it uses USB 1.1 or 2.0? The E-MU employs a USB 2.0 connection.
Once you have the USB cable and the Midi cables attached to the Miditron you are ready to power on. The power switch is above
the power in terminal coming from your 9 volt power supply.

You should now see a glowing RED LED followed by two blinks from a GREEN LED on the miditron board. You will also notice a
glowing white light on the USB tab of the E-MU 1 x 1 cable indicating power is correct. 
Miditron with power on 
PIC18F2220/2320 powers the miditron. 
This 10 MIPS (100 nanosecond instruction execution) haa 77 single word instructions. It features a (CMOS) Flash-based 8-bit
microcontroller with a PIC® architecture into an 28-pin package.

The chip features a "C compiler-friendly development environment, 256 bytes of EEPROM, Self-programming, an ICD, 2 
capture/compare/PWM functions, 10 channels of 10-bit Analog-to-Digital (A/D) converter, 2 comparators, the synchronous 
serial port can be configured as either 3-wire Serial Peripheral Interface (SPI™) or the 2-wire Inter-Integrated Circuit (I2C™)
bus and Addressable Universal Asynchronous Receiver Transmitter (AUSART), 8MHz internal RC oscillator and advanced low 
power oscillator controls. All of these features make it ideal for battery powered and power consumption critical applications
including instrumentation and monitoring, data acquisition, power conditioning, environmental monitoring, telecom and 

consumer audio/video applications."