H838024 datasheet(240/697 Pages) RENESAS

240 / 697 page

Section 8 I/O Ports

Rev. 7.00 Mar 10, 2005 page 198 of 652

REJ09B0042-0700

Bit 4—P14/

IRQ

ADTRG Pin Function Switch (IRQ4)

This bit selects whether pin P14/

IRQ

ADTRG is used as P1

4 or as

IRQ

ADTRG.

Bit 4

IRQ4

Description

Functions as P14 I/O pin

(initial value)

Functions as

IRQ

ADTRG input pin

Note:

For details of

ADTRG pin setting, see section 12.3.2, Start of A/D Conversion by External

Trigger Input.

Bit 3—P13/TMIG Pin Function Switch (TMIG)

This bit selects whether pin P13/TMIG is used as P13 or as TMIG.

Bit 3

TMIG

Description

Functions as P13 I/O pin

(initial value)

Functions as TMIG input pin

Bits 2 and 0—Reserved

These bits are reserved; they can only be written with 0.

Bit 1—Reserved

This bit is reserved; it is always read as 1 and cannot be modified.

Port Mode Register 2 (PMR2)

Bit

—

POF1

—

WDCKS

NCS

IRQ0

Initial value

Read/Write

—

R/W

—

R/W

PMR2 is an 8-bit read/write register. It controls whether the PMOS transistor internal to P35 is on

or off, the selection of the watchdog timer clock, the selection of TMIG noise cancellation, and

switching of the P43/

IRQ

0 pin functions.

Upon reset, PMR2 is initialized to H'D8.

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