Renesas SH7781 - Manual (Page 1683)

Appendix
Rev.1.00 Jan. 10, 2008 Page 1653 of 1658
REJ09B0261-0100
D. Turning On and Off Power Supply
D.1 Turning On and Off Between Each Power Supply Series
The order of the power supply between the 1.0V series power supply (VDD10: VDD and VDD-
PLL1 to 2 and VDDA-PLL1), the 1.8V series power supply (VDD18: VDD-DDR) and the 3.3V
series power supply (VDD33: VDDQ and VDDQ-PLL1 to 2 and VDDQ-TD*) is as follows.
Note: * If VDDQ-TD is connected to VDDQ.
• Turning On Power Supply
There is no restriction for the order of the power supply between each power supply series
(VDD10, VDD18, VDD33). Within 300 ms after turning on one power supply series, turn on
all the other power supply series.
• Turning Off Power Supply
There is no restriction for the order of the power supply between each power supply series.
(VDD10, VDD18, VDD33). Within 300 ms after turning off the one power supply series, turn
off all the other power supply series.
300 > t > or = 0
[ms]
0.1 × V**
V** min
0.9 × V**
0.2 [V]
V**:
VDD10, VDD18 (transition from DDR power supply backup), VDD33
V**:
VDD10, VDD18 (transition from DDR power supply backup), VDD33
300 > t > or = 0
[ms]
VDD10: VDD, VDD-PLL1 to 2, VDDA-PLL1
VDD18: VDD-DDR (except DDR2-SDRAM backup to turning on)
VDD33: VDDQ, VDDQ-PLL1 to 2, VDDQ-TD*
Note: * If VDDQ-TD is connected to VDDQ.
Turning on
Turning off
Figure D.1 Sequence of Turning On and Off Each Power Supply