Operational Flow Chart - Pioneer DEH-P77DHX1M Service Manual

DEH-P77DH,P47DH

7.3 OPERATIONAL FLOW CHART

Power ON
VDD=5V
19pin
bsens
93pin
BSENS=L
asens
92pin
ASENS=L
dsens
2pin
DSENS=L
ADPW←H
22pin
ASENB0←H
25pin
SWVDD←H
1pin
Source keys
operative
Source ON
SYSPW←H
21pin
Completes power-on operation. (After that, proceed to each source operation.)
66
Starts communication with Grille microcomputer.
300ms
300ms
In case of the above signal, the communication
with Grille microcomputer may fail.
If the time interval is not 300msec, the oscillator
may be defective.