R8C2A datasheet(91/609 Pages) RENESAS

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R8C/2A Group, R8C/2B Group

7. Programmable I/O Ports

Rev.2.00

Nov 26, 2007

Page 71 of 580

REJ09B0324-0200

Figure 7.16

Registers PUR0, PUR1, and PUR2

Pull-Up Control Register 1

Symbol

Address

After Reset

PUR1

00FDh

XX000000b

Bit Symbol

Bit Name

Function

NOTE:

PU12

P5_0 to P5_3 pull-up(1)

0 : Not pulled up

1 : Pulled up

PU15

P6_4 to P6_7 pull-up(1)

PU11

P4_4 and P4_5 pull-up(1)

PU13

—

(b7-b6)

Nothing is assigned. If necessary, set to 0.

When read, the content is undefined.

—

P5_4 pull-up(1)

PU14

P6_0 to P6_3 pull-up(1)

PU10

P4_3 pull-up(1)

b7 b6 b5 b4

When this bit is set to 1 (pulled up), the pin w hose direction bit is set to 0 (input mode) is pulled up.

b3 b2 b1

Pull-Up Control Register 0

Symbol

Address

After Reset

PUR0

00FCh

00h

Bit Symbol

Bit Name

Function

NOTE:

P2_4 to P2_7 pull-up(1)

P2_0 to P2_3 pull-up(1)

P0_4 to P0_7 pull-up(1)

P0_0 to P0_3 pull-up(1)

PU03

P1_4 to P1_7 pull-up(1)

P1_0 to P1_3 pull-up(1)

PU01

PU00

0 : Not pulled up

1 : Pulled up

b7 b6 b5 b4 b3 b2 b1

PU04

PU02

When this bit is set to 1 (pulled up), the pin w hose direction bit is set to 0 (input mode) is pulled up.

PU07

PU05

P3_4 to P3_7 pll-up(1)

PU06

P3_0 to P3_3 pll-up(1)

Pull-Up Control Register 2

Symbol

Address

After Reset

PUR2

02FCh

XXX00000b

Bit Symbol

Bit Name

Function

NOTE:

—

(b1-b0)

b7 b6

When this bit is set to 1 (pulled up), the pin w hose direction bit is set to 0 (input mode) is pulled up.

b3 b2 b1

b5 b4

—

(b7-b5)

Nothing is assigned. If necessary, set to 0.

When read, the content is undefined.

—

(b4)

Reserved bit

Set to 0.

Reserved bits

PU22

P8_0 to P8_3 pull-up(1)

Set to 0.

PU23

0 : Not pulled up

1 : Pulled up

P8_4 to P8_6 pull-up(1)

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