HD64F36049 datasheet(427/562 Pages) RENESAS

Part #	HD64F36049

Description	Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Tiny Series

PDF	562 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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Section 20 Power-On Reset and Low-Voltage Detection Circuits (Optional)

Rev. 3.00 Mar. 15, 2006 Page 395 of 526

REJ09B0060-0300

20.2.2

Low-Voltage-Detection Status Register (LVDSR)

LVDSR indicates whether the power-supply voltage falls below or rises above the respective

specified values.

Bit

Bit Name

Initial

Value

R/W

Description

7 to 2



All 1



Reserved

These bits are always read as 1, and cannot be

modified.

LVDDF

R/W

LVD Power-Supply Voltage Fall Flag

[Setting condition]

When the power-supply voltage falls below Vint (D)

(typ. = 3.7 V)

[Clearing condition]

Writing 0 to this bit after reading it as 1

LVDUF

R/W

LVD Power-Supply Voltage Rise Flag

[Setting condition]

When the power supply voltage falls below Vint (D)

while the LVDUE bit in LVDCR is set to 1, then rises

above Vint (U) (typ. = 4.0 V) before falling below

Vreset1 (typ. = 2.3 V)

[Clearing condition]

Writing 0 to this bit after reading it as 1

Note:

Initialized by LVDR.

HD64F36049 Datasheet(PDF) 427 Page - Renesas Technology Corp