R26 datasheet(82/487 Pages) RENESAS

82 / 487 page

R8C/26 Group, R8C/27 Group

7. Programmable I/O Ports

Rev.2.10

Sep 26, 2008

Page 63 of 453

REJ09B0278-0210

Figure 7.11

PMR Register

Port Mode Register

Symbol

Address

After Reset

PMR

00F8h

00h

Bit Symbol

Bit Name

Function

INT1

_____

pin select bit

NOTE:

1. The UART1 pins can be selected by using bits U1PINSEL, TXD1SEL and TXD1EN, and bits UART1SEL1 and

UART1SEL0 in the PINSR1 register.

IICSEL

SSU / I2C bus pin sw itch bit

0 : Selects SSU function

1 : Selects I2C bus function

TXD1EN

TXD1/RXD1 select bit(1)

0 : RXD1

1 : TXD1

TXD1SEL

Port/TXD1 pin sw itch bit(1)

0 : Programmable I/O port

1 : TXD1

U1PINSEL

TXD1 pin sw itch bit(1)

0 : P0_0

1 : P3_6, P3_7

SSISEL

SSI pin select bit

0 : P3_3

1 : P1_6

INT1SEL

0 : P1_5, P1_7

1 : P3_6

—

(b2-b1)

—

Nothing is assigned. If necessary, set to 0.

When read, the content is 0.

b3 b2 b1

b7 b6 b5 b4

PINSR1 Register

UART1SEL1,

UART1SEL0 bit

U1PINSEL bit

TXD1SEL bit

TXD1EN bit

P3_7(TXD1)

P3_7(RXD1)

P0_0(TXD1)

P3_7(TXD1)

P4_5(RXD1)

P3_6(TXD1)

P3_6(RXD1)

P0_0(TXD1)

×: 0 or 1

10b

××

PMR Register

Pin Function

00b

××

01b

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