Pioneer BDP-94HD Service Manual page 26

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1.Reset specification
[On start-up]
A
Receiving Power ON key, sub-microcomputer turns Power_ON signal to "H".
Receiving Power ON signal, power turns each SW power to "ON".
V+3D turns ON, then ResetG# to "L" by ResetIC.
Sub-microcomputer turns H,I,J to "L" by ResetG#"L"and Reset#,Reset2#,Reset3# to "L".
ResetG# is "L"⇒(after 200ms) to "H" *IC3901 BD45282 operation.
Sub-microcomputer receives ResetG#"H", then turns H,I,J to "H".
H,I,J transit to "H", then Reset#,Reset2#,Reset3#"L" turn to "H".
Power_ON
V+3D
ResetG#
B
Reset#,2#3#
[At normal end]
Sub-microcomputer detects the pushing of Power key, then notifies PowerOFF to SMP8634 by I2C.
Receiving PowerOFF notification, SMP8634 conducts end processing.
SMP8634 instructs PowerOFF to sub-microcomputer by I2C.
Sub-microcomputer turns H,I,J to "L", and after 50msec, PowerON signal to "L".
By turning H,I,J to "L", Reset#,Reset2#,Reset3# "H" turn to "L".
After 50msec, power turns each SW power to OFF.
H,I,J
C
Reset#,2#3#
Power_ON
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[Power abnormality]
*Reset operation in the case of 1.2V or 3.3V drop.
Determine if ResetG becomes "L", then turn Reset# - Reset2# to L, and after 200ms to "H".
V+3D,V+1R2D
ResetG#
D
Reset#,2#3#
[At abnormal end]
ACOFF
By turning V+5E to OFF, RES# turns to "L". Sub-microcomputer stops.
By turning V+1R2D and V+3D to OFF, ResetG# turns to "L" by ResetIC.
By RES# sub-microcomputer stops and Reset output is in the "PullDown", turns immediately to "L" .
Power_ON
V+5E
E
RES#
V+3D
V+1R2D
ResetG#
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Reset#,2#3#
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PON key
SMP8634 is recommended to unlock RST after 200ms from V+3D startup.
200ms
completion notice of I2C
SMP8634 end processing
50ms
in case of V+1R2D : 0.75ms
in case of V+3D : 200ms
200ms
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By RES# sub-microcomputer stops and Reset
output is in the "ZPullDown", turns immediately to "L".
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in each case, if FallEdge is detected, turn to
200ms "L"hold. (required reset time for SMP8634)
discharge by capacity
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BDP-94HD
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2 9 9 4
1 3 1 5 0 5 8 2 9
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2 8
9 9
9 4 2 8 9 9