Operational Flow Chart - Pioneer GEX-FM903XM/UC Service Manual

GEX-FM903XM

7.3 OPERATIONAL FLOW CHART

Power ON
VCC=3V
Pin 16
RESET
Pin 12
RESET=H
BSENS
Pin 75
BSENS=L
ASENSFM
Pin 73
ASENSFM=L
ACCPW←H
Pin 40
DISPPW←H
Pin 24
POWER key valid
POWER ON
SYSPW←H
Pin 51
XMPW←H
Pin 84
Completes power-on operation.
68
Starts communication with Grille microcomputer.
500ms
300ms
In case of the above signal, the communication
with Grille microcomputer may fail.