Power-On Sequence When Using Ram Backup - Mitsubishi Electric M32R Series User Manual

20

20.2.2 Power-On Sequence When Using RAM Backup

The diagram below shows a power-on sequence (5.0 V, 3.3 V power supply) of the M32R/E when
using RAM backup.
VCCE
0V
AVCC0,
0V
AVCC1
VREF0,
VREF1
0V
RESET
0V
VDD
0V
VCCI
0V
FVCC
0V
OSC-VCC
0V
: Turn on the 3.3 V power supply after turning on the 5 V power supply.
: After turning on all power supplies and holding the RESET pin low for an oscillation
stabilization time, release the RESET pin input back high (to deactivate reset).
Note: Power-on limitations
• VDD
• VCCE
Figure 20.2.2 Power-On Sequence When Using RAM Backup
5V
5V
5V
1
3.3V
2.0V
3.3V
3.3V
3.3V
____________
OSC-VCC VCCI
VCCI, FVCC, OSC-VCC
2
____________
FVCC
20-4
5V
Ver.0.10