Table of Contents
Advertisement
20
20.1 Configuration of the Power Supply Circuit
To materialize high-speed operation at low power, the M32R/E is designed in such a way that its
external interface circuits operate at 5 V power supply and all other circuits operate at 3.3 V. This
requires that control timing of both 5 V and 3.3 V power supplies be considered when designing
your circuit.
5 V power supply
3.3 V power supply
Figure 20.1.1 Configuration of the Power Supply Circuit
Table 20.1.1 List of Power Supply Functions
Type of Power Supply
5.0 V system
3.3 V system
POWER-UP/POWER-SHUTDOWN SEQUENCE
20.1 Configuration of the Power Supply Circuit
VCCE
AVCC
VCCI
VDD
FVCC
OSC-VCC
Pin Name
VCCE
AVCC0, AVCC1
VREF0, VREF1
VCCI
FVCC
VDD
OSC-VCC
20-2
M32R/E
I/O control circuit
A-D converter circuit
CPU
Peripheral circuit
RAM
Flash
Oscillator and PLL circuits
Function
Supplies power to external I/O ports
Power supply for A-D converter
Reference voltage for A-D converter
Supplies power to internal logic
Power supply for internal flash memory
Power supply for internal RAM backup
Power supply for oscillator and PLL circuits
Ver.0.10
Advertisement
Table of Contents
