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FUJITSU MB91460 SERIES FR60 User Manual

Page 997

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981

Chapter 52 Regulator Control

3.Registers

• REGSEL: Address 04CEh (Access: Byte, Halfword, Word)

(See “

Meaning of Bit Attribute Symbols (Page No.10)

” for details of the attributes.)

• Bit7-6: Reserved bit. The read value is always “0”.

• Bit5: Flash memory supply mode.

Note: Please check with the related device datasheet if this setting is supported.

• Bit4: Main Regulator supply mode.

Note: Please check with the related device datasheet if this setting is supported.

• Bit3-0: Sub-regulator voltage level

Note: The set level of the Sub-regulator voltage is only be effective in case of Main Regulator is switched
off. Otherwise (with main regulator on) the default level is applied internally by hardware to the Sub-Reg-
ulator (the register setting is not changed in this case and will be applied next time the main regulator is
switched off).

7

6

5

4

3

2

1

0

bit

-

-

FLASHSEL

MAINSEL

SUBSEL3

SUBSEL2

SUBSEL1

SUBSEL0

0

0

0

0

0

1

1

0

Initial value (

INIT pin input,

watchdog reset

)

X

X

X

X

X

X

X

X

Initial value

(Software reset)

R0/WX

R0/WX

R/W

R/W

R/W

R/W

R/W

R/W

Attribute

FLASHSEL

Function

0

Flash memory operation mode is 1.8V [Initial value]

1

Flash memory operation mode is 1.9V

MAINSEL

Function

0

Main regulator operation mode is 1.8V [Initial value]

1

Main regulator operation mode is 1.9V

SUBSEL3-SUBSEL0

Voltage level

0111

1.9V +/- 0.1V

0110

1.8V +/- 0.1V (initial)

0101

1.7V +/- 0.1V

0100

1.6V +/- 0.1V

0011

1.5V +/- 0.1V

0010

1.4V +/- 0.1V

0001

1.3V +/- 0.1V

0000

1.2V +/- 0.1V