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Registers, 1 lv detection control registers, Registers 3.1 lv detection control registers – FUJITSU MB91460 SERIES FR60 User Manual

Page 992

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976

Chapter 51 Low Voltage Reset/Interrupt

3.Registers

3. Registers

3.1 LV Detection Control Registers

Controls the low voltage detection function.

• LVDET: Address 04C5h (Access: Byte, Halfword, Word)

(See “

Meaning of Bit Attribute Symbols (Page No.10)

” for details of the attributes.)

• Bit7: Reserved bit. The read value is always ‘0’.

• Bit6: Low-Voltage Interrupt Source selection.

• Bit5: External Low-Voltage Detection Power-Down.

• Bit4: Internal Low-Voltage Detection Power-Down.

• Bit3: Low-Voltage Reset Enable.

• Bit2: Reserved bit.

• Bit1: Low-Voltage Interrupt Enable.

• Bit0: Low-Voltage Interrupt Flag.

7

6

5

4

3

2

1

0

bit

-

LVSEL

LVEPD

LVIPD

LVREN

-

LVIEN

LVIRQ

-

0

0

0

0

-

0

0

Initial value (

INIT pin input,

watchdog reset

)

-

X

X

X

X

-

0

0

Initial value

(Software reset)

R0/W0

R/W

R/W

R/W

R/W

R0/W0

R/W

R/W

Attribute

LVSEL

Function

0

Internal (VDD) LV detection used for LV-Int and LV-Reset [Initial value]

1

External (VDD5) LV detection used for LV-Int and LV-Reset

LVEPD

Function

0

External (VDD5) LV detection active [Initial value]

1

External (VDD5) LV detection power down

LVIPD

Function

0

Internal (VDD) LV detection active [Initial value]

1

Internal (VDD) LV detection power down

LVREN

Function

0

Low Voltage Reset Disabled [Initial value]

1

Low Voltage Reset Enabled

LVIEN

Function

0

Low Voltage Interrupt Disabled [Initial value]

1

Low Voltage Interrupt Enabled

LVIRQ

Function

0

Low Voltage Interrupt Flag (no interrupt request) [Initial value]

1

Low Voltage Interrupt Flag (interrupt requested)