Technical Note
BD4156MUV
●Reference data
CPPE#(2V/div)
CPPE#(2V/div)
V3(2V/div)
SYSR(2V/div)
V3(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
5.0ms/div
V3AUX(2V/div)
RV3=3.3Ω
RV3AUX=13.2Ω
V3AUX(2V/div)
RV15=3Ω
V15(1V/div)
5.0ms/div
V15(1V/div)
5.0ms/div
Fig.1 Card Assert/ De-assert
(Active)
Fig.2 Card Assert/De-assert
(Standby)
Fig.3
System Active
⇔Standby( Card Present)
SYSR(2V/div)
CPUSB#(2V/div)
V3(2V/div)
CPPE#(2V/div)
V3(2V/div)
V3(2V/div)
V3AUX(2V/div)
V3AUX(2V/div)
V15(1V/div)
V3AUX(2V/div)
V15(1V/div)
V15(1V/div)
500μs/div
5.0ms/div
Fig.4 System Active
⇔Standby(No Card)
500μs/div
Fig.5 Wakeup Wave Form
(Card Assert)
Fig.6 Wakeup Wave Form
(USB2.0 Assert)
SYSR(2V/div)
CPPE#(2V/div)
EN(2V/div)
V3(2V/div)
V3(2V/div)
V3(2V/div)
V3AUX(2V/div)
V3AUX(2V/div)
V3AUX(2V/div)
V15(1V/div)
V15(1V/div)
V15(1V/div)
500μs/div
500μs/div
500μs/div
Fig.7
Wakeup Wave Form
Fig.8
Wakeup Wave Form
(Standby→Active)
Fig.9 Power Down Wave Form
(Card De-assert)
(Shut Down→Active)
CPUSB#(2V/div)
SYSR(2V/div)
EN(2V/div)
V3(2V/div)
V3(2V/div)
V3(2V/div)
V3AUX(2V/div)
V3AUX(2V/div)
V15(1V/div)
V3AUX(2V/div)
V15(1V/div)
V15(1V/div)
5.0ms/div
500μs/div
500μs/div
Fig.10 Power Down Wave Form
(USB2.0 De-assert)
Fig.11 Power Down Wave Form
Fig.12 Power Down Wave Form
(Active→Standby)
(Active→Shut Down)
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2009.05 - Rev.A
4/23
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