Reset On Sequence - Pioneer BDP-51FD Service Manual

5

5.2 RESET ON SEQUENCE

[1] Block Diagram
[detect 1.1 V Reset]
After detecting 1.1 V ON/OFF,
Transit ResetG "L", then instantly
3.3V
to ResetG "H".
10k IC4001
1.1V
Subcon
IC4201
1.1V
ResetIC
3.3V(E)
SCON_XRESET
After detecting 3.3 V(E) ON/OFF,
IC4002
22k
hold 200ms SCON_XRESET "L"
3.3V
ResetIC
and turn to SCON_XRESET "H".
By main reset release "H", Subcon
conducts operation.
[2] Reset specification
[On start-up]
Receiving Power ON key, sub-microcomputer turns Power_ON signal to "H".
Receiving Power ON signal, power turns each SW power to "ON".
1.1 V turns ON.
Sub-microcomputer is (after 400 ms) to Reset_SKY#, Reset 2#, Reset 3# "L" turn to "H".
Power_ON
1.1 V
Reset_SKY#,2#,3#
[At normal end]
Sub-microcomputer detects the pushing of Power key, then notifies PowerOFF to R8A34019BG by I C.
Receiving PowerOFF notification, R8A34019BG conducts end processing.
R8A34019BG instructs PowerOFF to sub-microcomputer by I C.
Sub-microcomputer turns Reset_SKY#, Reset 2#,Reset 3#,to "L", and after 1 sec, PowerON signal to "L".
After 50msec, power turns each SW power to OFF.
Reset_SKY#,2#,3#
Power_ON
[Power abnormality]
*Reset operation in the case of 1.1 V drop.
Determine if ResetG becomes "L", then turn Reset# - Reset3# to "L".
[At abnormal end]
ACOFF
By turning V+1R1D to OFF, ResetG# turns to "L" by ResetIC.
Power_ON
V+1R1D
Reset
(IC4201 OUT)
Reset_SKY#,
Reset 2#,
Reset 3#
5
6
RESET_SKY#
0 Ω
RESET2#
0 Ω
PON key
400 ms
1 sec
6
7
3.3V 1.1V 1.8V
MAIN LSI
Main_LSI
R8A34019BG
NOR FLASH
HDMI
SiI9134
2
BDP-51FD
7
8
Drive
ATIRESET
NOR FLASH
HDMI_RESET
R5034
2
8
A
B
C
D
E
F
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