Technical Note
14/19
BU7963GUW
www.rohm.com
2010.04 - Rev.A
© 2010 ROHM Co., Ltd. All rights reserved.
4) Power-On / Off Sequence
Power-On Sequence
Fig.12 shows power-on sequence of BU7963GUW.
Fig.12. Power-On / Off Sequence
Table 15. Power-On Sequence Timing
Ta=25°C, DVDD=MS VDD=1.80V, and DGND=MSGND=0.00V, unless otherwise noted.
Parameter Symbol
Limits
Unit
Conditions
Min Typ Max
Core power supply startup time
t
TX_VDD_IOV
0.0 - 2
ms
Reset Valid After Power Supplied
t
TX_VDD_XSD
10 - -
µs
PCLK clock input startup time
t
TX_IN_VAL
10 -
- µs
MSDL3 output delay time
t
TX_OUT_VAL
- - 2
ms
DVDD,
MSVDD of Tx
t
TX_VDD_XSD
t
TX_IN_VAL
XSD of Tx
PCLK of Tx
t
TX_OUT_VAL
Stopped
Provided
Valid
Tx MSDL
3 Output
HiZ
DVDD,
MSVDD of Rx
t
RX_VDD_XSD
t
RX_IN_VAL
XSD of Rx
Rx Power mode
t
RX_OUT_VAL
Shutdown
Standby / Active
Rx All Outputs
Initial Value
Valid Outputs
Tx: BU7963GUW
Rx: BU7964GUW
