R8CSLASH2G datasheet(74/344 Pages) RENESAS

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R8C/2G Group

7. Comparator

Rev.1.00

Apr 04, 2008

Page 54 of 318

REJ09B0387-0100

Figure 7.10

BGRTRM Register

Figure 7.11

PINSR4 Register

BGR Trimming Register(1)

Symbol

Address

After Reset

BGRTRM

003Fh

When Shipping

NOTE:

1. Set the PRC3 bit in the PRCR register to 1 (w rite enabled) before rew riting the BGRTRM register.

Function

Bits 0 to 7 can be used to adjust the level of the internal reference voltage (Vref).

Write either of the follow ing values into the BGRTRM register.

• Value stored in the BGRTRMA register

• Value stored in the BGRTRMB register

• 15h

Do not w rite values other than the above into the BGRTRM register.

Follow the procedure show n in Figure 7.16 for w riting data to the BGRTRM register.

b3 b2 b1 b0

b7 b6 b5 b4

Pin Select Register 4

Symbol

Address

After Reset

PINSR4

02FBh

00h

Bit Symbol

Bit Name

Function

KI0

____

pin select bit

KI1

____

pin select bit

TREO pin select 2 bit

0 : Voltage monitor 1, voltage monitor 2

1 : Comparator 1, comparator 2

b3 b2 b1

b7 b6 b5 b4

COMPSEL

TRFOSEL

000

TRFO11 pin select bit

0 : P3_4

1 : P3_7

Voltage monitor/comparator

select bit

KI0SEL

0 : P1_0

1 : P0_7

—

(b6-b4)

TREOSEL2

Set to 0.

Reserved bits

KI1SEL

0 : P1_1

1 : P6_6

0 : TREOSEL bit in PINSR3 register enabled

1 : P6_5

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