User’s Manual U13850EJ6V0UD
517
CHAPTER 16 REGULATOR
16.1 Outline
The V850/SB1 and V850/SB2 incorporate a regulator to realize a 5 V single power supply, low power
consumption, and to reduce noise.
This regulator supplies a voltage obtained by stepping down the V
DD
power supply voltage to the oscillation blocks
and on-chip logic circuits (excluding the A/D converter and output buffers). The regulator output voltage is set to 3.3
V (V850/SB1, H versions of V850/SB2) or 3.0 V (A and B versions of V850/SB2).
Refer to
2.4 I/O Circuit Types, I/O Buffer Power Supplies and Connection of Unused Pins
for the power
supply corresponding to each pin.
Figure 16-1. Regulator
A/D converter
4.5 V
to
5.5 V
AV
DD
Main/Sub
oscillators
On-chip digital circuit
3.3 V: V850/SB1,
H versions of
V850/SB2
3.0 V: A, B versions of
V850/SB2
Regulator
V
D
D
BV
DD
EV
DD
Flash memory
3.0 V
to
5.5 V
3.0 V to
5.5 V
Bidirectional
level shifter
EV
DD-
system I/O buffer
BV
DD-
system I/O
buffer
V
P
P
RE
G
C
16.2 Operation
The regulators of the V850/SB1 and V850/SB2 operate in every mode (STOP, IDLE, HALT).
For stabilization of regulator outputs, connect an electrolytic capacitor of about 1
µ
F to the REGC pin.
Содержание V850/SB1
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