Power Supply Circuit - Renesas Renasas Single-Chip Microcomputer SH7086 User Manual

2

2.6 Power Supply Circuit

The M3A-HS86 accepts a 5V power supply as its input and generates 3.3V from it by using a regulator.
The M3A-HS86 (3.3V version) and M3A-HS86 (5V version) are different according to whether R37 and R38 are
mounted.
- M3A-HS86 (3.3V version) : R37 is not mounted, R38 is mounted
- M3A-HS86 (5V version) : R37 is mounted, R38 is not mounted
Figure2.6.1 shows the block diagram of power supply circuit in the M3A-HS86.
5V
SW1
3.3V Device
Extension Connector
Rev.1.0 Feb 06. 2007
REJ10J0916-0100
Extension Connector
5VCC
3VCC
5V⎝
3.3V
Memory
SDRAM
(Not mounted)
M3A-HS86 (3.3V version) only
Figure2.6.1 Block Diagram of Power Supply Circuit
JP1
R37
VCC
R38
VCC_EX
External Power Supply
(Only for CPU)
Flash
Functional Overview
2.6 Power Supply Circuit
VCC_CPU
AVCC
VCC
AVREF
SH7086
2-13