H8SXSLASH1663M datasheet(138/1504 Pages) RENESAS

138 / 1504 page

Section 5 Voltage Detection Circuit (LVD)

Rev. 2.00 Sep. 24, 2008 Page 106 of 1468

REJ09B0412-0200

5.2

The registers of the voltage detection circuit are listed below.

•

Voltage detection control register (LVDCR)

•

Reset status register (RSTSR)

5.2.1

Voltage Detection Control Register (LVDCR)

The LVDCR controls the voltage-detection circuit.

LVDE, LVDRI, and LVDMON are initialized by a pin reset or power-on reset

Bit

Bit name

Initial value:

R/W:

LVDE

R/W

LVDRI

R/W

—

R/W

LVDMON

—

R/W

—

R/W

—

R/W

—

R/W

Bit

Bit Name

Initial Value

R/W

Description

LVDE

R/W

LVD Enable

This bit enables or disables issuing of a reset or

interrupt by the voltage-detection circuit.

0: Disabled

1: Enabled

LVDRI

R/W

LVD Reset/Interrupt Select

This bit selects whether an internal reset or

interrupt is generated when the voltage detection

circuit detects a low voltage. When modifying the

LVDRI bit, ensure that low-voltage detection is in

the disabled state (the LVDE bit is cleared to 0).

0: A reset is generated when a voltage is

detected.

1: An interrupt is generated when a low voltage is

detected.

—

R/W

Reserved

This bit is always read as 0 and the write value

should always be 0.

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