Renesas Renasas Single-Chip Microcomputer SH7086, User Manual

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Functional Overview
2.6 Power Supply Circuit
Rev.1.0 Feb 06. 2007 2-13
REJ10J0916-0100
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
Extension Connector
SW1
External Power Supply
(Only for CPU)
3.3V Device
M3A-HS86 (3.3V version) only
Extension Connector
5VCC
3VCC
5V
⎝
3.3V
VCC
R38
R37
VCC_CPU
VCC_EX
VCC
AVCC
AVREF
SH7086
Flash
Memory
(Not mounted)
SDRAM
JP1
Figure2.6.1 Block Diagram of Power Supply Circuit