Renesas M32R/ECU Series User Manual page 735

20
20.1 Configuration of the Power Supply Circuit
The 32180 operates with a single 5 V ± 0.5 V or 3.3 V ± 0.3 V power supply.
Unless otherwise noted, 5 V ± 0.5 V and 3.3 V ± 0.3 V in this chapter are referred to simply by 5 V and 3.3 V,
respectively.
Table 20.1.1 Power Supply Functions
Power Supply Type
5.0V or 3.3V
1–10 µF
1–10 µF
Figure 20.1.1 Configuration of the Power Supply Circuit (VCCE = 5.0 V or 3.3 V)
Pin Name
VCCE
AVCC0, AVCC1
VREF0, VREF1
VCC-BUS
OSC-VCC
VDDE
I/O Control Circuit
Internal Voltage Generator Circuit
VCCE
VDDE
Backup Voltage Generator Circuit
Sub-VDC
EXCVDD
RAM
EXCVCC
(Note 1)
OSC-VCC
AVCC
VCC-BUS
Note 1: Make sure this voltage is the same as VCCE.
POWER SUPPLY CIRCUIT
20.1 Configuration of the Power Supply Circuit
Function
Main power supply
Power supply for the A-D converter
Reference voltage for the A-D converter
Power supply for the external bus
Power supply for the oscillator circuit
Power supply for the internal RAM backup
32180
Main VDC
VDC
CPU
Peripheral Circuit
Flash Memory
PLL
Oscillator Circuit
A-D Converter Circuit
External Bus
20-2
32180 Group User's Manual (Rev.1.0)