Power On Sequence - Pioneer DJM-800 Service Manual

1

7.2 POWER ON SEQUENCE

Power ON Sequence
A
Power ON
Release the CPU reset
Interrupt mask
B
Mute ON
CPU initialization
RAM clear
Interrupt enable
C
TSTR timer interrupt set
Display a model name in FL
FPGA program load
(470ms)
D
Release the FPGA reset
DSP reset
Release the DSP reset
E
WAIT (10m sec)
F
146
1
2
Release the reset when pin 92
of IC1 is H.
Pin 3 of IC1 is H.
Data and clock outputs with pins
142 and 138 of IC1.
Control with pins 57 and 58.
Clear the FPGA program when
pin 24 of IC1 is H. Data and clock
outputs with pins 137 and 141.
Load is completed normally when
pin 71 of IC13 is H.
Release the reset when pin 27
of IC1 is H.
Wait for 30ms when pin 26 of IC1
is H, and wait for 60ms with L,
then reset it.
Release the reset when pin 26 of
IC1 is H. Also release the reset
the IC904, IC1501, IC918, IC409,
IC509, IC609, IC709, IC1307,
IC1308, IC1202, IC1203, IC1208,
IC1209, IC1214, IC1215, IC1217,
IC1218 and IC12 with this pin.
DJM-800
2
3
Data and clock outputs with pins
DAC initialization
133 and 135 of IC1.
WAIT (10 msec)
Initial setting of the work
Data and clock outputs with pins
DIT initialization
142 and 138 of IC1.
Bootwait of DSP
WAIT (500 msec)
Yes
Test mode ?
No
Yes
MIDI CH setting
mode ?
No
4CH realtime initialization.
DIR initialization
Data output with pins 10 and 13
of IC13, and clock output with
pins 11 and 14.
Waits for noise rejection
WAIT (4000 msec)
Pin 3 of IC1 is L
Mute OFF
Starts the LED display
Starts the key scan
Main processing
3
4
Test mode processing
MIDI CH setting mode
processing
4