M32CSLASH8B datasheet(55/406 Pages) RENESAS

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Under development

M32C/8B Group

6. Power Supply Voltage Monitor Function

Preliminary specification

Specifications in this manual are tentative and subject to change.

REJ09B0450-0050 Rev.0.50 Oct 31, 2008

Page 38 of 385

Figure 6.3

DVCR Register

b7 b6 b5 b4

Reference Voltage Configuration Register

Symbol

DVCR

Address

0017h

Bit Symbol

Bit Name

RVC0

After Reset

1000 1111b

Function

Reference voltage select bits(2)

RVC1

NOTES:

1. Set the DVCR register after setting the PRC3 bit in the PRCR register is set to 1 (write enable) while the VDEN bit in the LVDC

2. The detection voltage levels of Vdet(F) and Vdet(R) lists as below.

b3 b2 b1 b0

0 0 0 0 : 3.80 V

0 0 0 1 : 3.65 V

0 0 1 0 : 3.50 V

0 0 1 1 : 3.35 V

0 1 0 0 : 3.20 V

1 0 1 1 : 4.55 V

1 1 0 0 : 4.40 V

1 1 0 1 : 4.25 V

1 1 1 0 : 4.10 V

1 1 1 1 : 3.95 V

Do not set to the value other than the above.

RVC2

RVC3

Reserved bit

−

(b7)

Unimplemented.

Write 0. Read as undefined value.

−

(b6-b4)

−

Set to 1

4.55V

4.77V

4.40V

4.25V

4.10V

3.95V

3.80V

3.65V

3.50V

3.35V

3.20V

4.62V

4.47V

4.32V

4.17V

4.02V

3.87V

3.72V

3.57V

3.42V

1011b

1100b

1101b

1110b

1111b

0000b

0001b

0010b

0011b

0100b

Reference voltage

Detection voltage level

(Voltage drops)

Vdet(F)

Detection voltage level

(Voltage rises)

Vdet(R)

Bits

RVC3 to RVC0

4.55V

4.40V

4.25V

4.10V

3.95V

3.80V

3.65V

3.50V

3.35V

3.20V

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