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32186 Datasheet(PDF) 913 Page - Renesas Technology Corp

Part # 32186
Description  MCU
PDF  1032 Pages
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Manufacturer  RENESAS [Renesas Technology Corp]
Direct Link  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

32186 Datasheet(HTML) 913 Page - Renesas Technology Corp

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22
POWER SUPPLY CIRCUIT
22-5
32185/32186 Group Hardware Manual
Rev.1.10 REJ09B0235-0110 May 15, 07
22.3 Power-Off Sequence
22.3 Power-Off Sequence
22.3.1 Power-Off Sequence when Not Using RAM Backup
The diagram below shows a turn-off sequence of the power supply (5.0 V or 3.3 V) when not using RAM backup.
(Note 1)
Note 1: Wait until the RESET# pin goes "L" before turning the power supply off.
Notes: • Power-off limitation
VDDE>=VCCER
In addtion, when VDDE is more than 3.0V, it is not problem even if it cannot fulfill a restrictions (VDDE>=VCCER).
• However, if it cannot fulfill a restrictions (VDDE>=VCCER) when Power-On, sufficient evaluation must be made
during system design in order to ensure that no power will be applied to the microcomputer with a potential difference
of 1 V or more.
For potential differences 0 V to 0.6 V, there is almost no in-flow current. The amount of in-flow current begins to
increase when the potential difference exceeds 0.6 V.
AVCC0
VREF0
RESET#
VDDE
0V
0V
0V
0V
0V
VCCE, VCCER,
VCC-BUS
Figure 22.3.1 Power-Off Sequence when Not Using RAM Backup



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