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05.1
Technical details
Electrical Properties
MIDI OUT
The midiclock has two MIDI ports (DIN, 5-pole). They provide a current
loop and are designed for opto-coupler driven slaves, like documented
in the MIDI specs. The no-load voltage is 3.3V, the short-circuit current
is 20mA.
Power
The USB port (Type B) acts only as a power supply. You can use either
a computer or an external power adaptor. The power consumption is
max. 75mA at 5V when used properly.
Please note that the input voltage must not exceed 7V under any
circumstances.
Dimensions and Weight
The dimensions with knob and rubber feet are 48mm high, 95mm long
and 62mm wide. The weight is 235g without cable.
05.2
Table of MIDI commands
The midiclock uses the following MIDI commands to synchronise and
control all connected slaves:
The MIDI clock command (0xF8) is always being sent when a power
supply is connected. The jitter is 0.1µs on average, the maximum devi-
ation is 0.46µs.
Function
MIDI command
Synchronisation MIDI clock:
0xF8
Start Song Position Pointer: 0xF2, 0x00, 0x00
MIDI start: 0xFA
Pause MIDI stop: 0xFC
Continue MIDI continue: 0xFB
Reset like 'Start'
Resync like 'Start', but on the next downbeat
