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The V850E/IA1 has three types of power supply pins: 3.3 V power supply pins for internal units (V
V power supply pins for external pins (V
This chapter explains the I/O pin status when power is turned ON/OFF.
µ
Note
PD70F3116 only
[Recommended timing of turning ON/OFF power]
• To turn ON
Keep the voltage on the V
the operation is guaranteed (3.0 to 3.6 V).
• To turn OFF
Keep the voltage on the V
on the V
and AV
DD5
DD
• When releasing reset status by RESET pin
Release the reset status by the RESET pin after both the 3.3 V power supply and 5 V power supply have risen.
Figure 17-1. Recommended Timing of Turning ON/OFF Power
V
DD3
0 V
V
, AV
DD5
DD
0 V
RESET (input)
0 V
I/O pin
0 V
Remark
The broken line indicates a high-impedance state.
CHAPTER 17 TURNING ON/OFF POWER
and AV
), and a flash programming power supply pin (V
DD5
DD
and AV
pins at 0 V until the voltage on the V
DD5
DD
pin at the level at which the operation is guaranteed (3.0 to 3.6 V), until the voltage
DD3
pins has dropped to 0 V.
3.0 V
4.5 V
User's Manual U14492EJ5V0UD
pin rises to the level at which
DD3
3.0 V
4.5 V
Depends on program setting
and CV
), 5
DD3
DD
Note
)
.
PP
759
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