3. Block Diagram
3-1. Key Scanner
Scanning is beginning from the C # note of Octave 0 to detect the status of the hammers within the octave
for witch Pin K is "1" (the octave in which a key is being pressed).
Key scanning is then stopped for 16
µ
Sec. while that hammer status is sent to the key Assignor. During
the next 16
µ
Sec. interval, the next higher octave is scanned if the Pin K has not become "1" during that
interval, scanning shifts to the next note (D). Consequently, if "N" is the number of keys being pressed,
the scanning time for all keys (T) conforms to the equation below:
T=16x(12 + N)
µ
Sec.
49
Summary of Contents for disklavier MX-100A
Page 1: ...MX 100A ...
Page 19: ...Block Diagram 16 ...
Page 39: ...36 ...
Page 41: ...Program Flow chart Memory Map of Disklavier 38 ...
Page 46: ...3 LIST OF PMAC TERMINALS 43 ...
Page 47: ...44 ...
Page 49: ...LIST OF MB8877 TERMINALS 46 ...
Page 56: ...3 7 Timing Chart of CLK and DATA 53 ...
Page 60: ...CPU Circuit Board 57 58 ...
Page 61: ...I O Circuit Board 59 60 ...
Page 70: ...2 Control Unit 8 Part No EV303046 EI330056 EA026056 VE514700 MZ501260 VE479800 ...
Page 76: ...8 I O Unit Power Supply Unit MIDI Unit 16 ...
Page 78: ...SM8549 ...
Page 79: ......
Page 80: ......