BD4154FV
●Reference data
CPPE#(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
5.0ms/div
Fig.1 Card Assert/ De-assert
(Active)
SYSR(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
5.0ms/div
Fig.4 System Active⇔Standby
(No Card)
EN(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
500μs/div
Fig.7 Wakeup Wave Form
(Shut Down→Active)
CPUSB#(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
500µs/div
Fig.10 Power Down Wave Form
(USB2.0 De-assert)
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
Technical Note
CPPE#(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
5.0ms/div
Fig.2 Card Assert/De-assert
(Standby)
SYSR(2V/div)
V3(2V/div)
V3AUX(2V/div)
RV3=3.3Ω
RV3AUX=13.2Ω
RV15=3Ω
V15(1V/div)
5.0ms/div
Fig.3 System Active⇔Standby
( Card Present)
CPPE#(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
500μs/div
Fig.5 Wakeup Wave Form
(Card Assert)
SYSR(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
500μs/div
Fig.8 Wakeup Wave Form
(Standby→Active)
EN(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
500µs/div
Fig.11 Power Down Wave Form
(Active→Shut Down)
4/15
CPUSB#(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
500μs/div
Fig.6 Wakeup Wave Form
(USB2.0 Assert)
CPPE#(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
500µs/div
Fig.9 Power Down Wave Form
(Card De-assert)
SYSR(2V/div)
V3(2V/div)
V3AUX(2V/div)
V15(1V/div)
5.0ms/div
Fig.12 Power Down Wave Form
(Active→Standby)
2009.05 - Rev.A