YDP-162B/YDP-162C/YDP-162R/YDP-162PE
47
Power ON
Set
CPU, each registers
Initialize BOOT SDRAM
0 clear, Setup of Constant
*1 “Factory Set” refers to the condition of turning on the power after executing “Factory Set” in the Test Program.
NG
OK
Main
routine
Safe check (*2)
After executing
Factory Set (*1)
Installation mode ?
Installation mode start
(REC LED flashes)
Yes
No
Starts scanning to
SW, LED, Keyboard
Port initial setting
SPOFF=H (IC101, T2)
MUTE=H (IC101, T3)
ERR-DETECT=L (IC101, AB19)
Initialize EBUS driver
(EBUS Start)
EICN=H (IC101, C12)
Pulse is output from
ERR-DETECT
(IC101, AB19)
Pulse is output from
ERR-DETECT
(IC101, AB19)
MUTE=L (IC101, T3)
SPOFF=L (IC101, T2)
Depending on whether
headphones are inserted or not.
All LEDs flash.
Then L&R LEDs flash.
Yes
No
Starts accessing to
IC302.
Starts accessing to
IC301.
Initialize SWX port
Starts communicate
with EBUS
Initialize EBUS driver
(EBUS Start)
EICN=H (IC101, C12)
EICN=L (IC101, C12)
Scanning SW
(PA0-PA6)
Test Mode ?
No
Yes
Indicate Test Mode screen
(A3 sine wave output)
*2 As for the safe check, it checks whether the mute functions correctly when the pulse from ERR-DETECT is interrupted.
If these LEDs flash every time,
MAIN FLASH ROM (IC302)
may be defective.
If safe check fails, does not
start.
Check the error detection
circuit in Test Mode.
If access to IC302 does
not start, IC101 may be
defective.
If access to IC301 does
not start, IC302 may be
defective.
SYSTEM BOOTING FLOWCHART
Содержание ARIUS YDP-162B
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