HD6433713 datasheet(125/324 Pages) RENESAS

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PMR1 is an 8-bit read/write register that controls the selection of pin functions for pins

P16/EVENT, P15/IRQ5, P14/IRQ4, P11/IRQ1, and P10/IRQ0, and turns the IRQ0 noise

cancellation function on and off.

Upon reset, PMR1 is initialized to H'0C.

Note: Before switching pin functions using bits IRQ5 to IRQ0 in PMR1, first disable the

corresponding interrupts by clearing their interrupt enable bits. After the pin functions

have been switched, issue any instruction, then clear the interrupt request flags to 0. For

details see section 3.2.3 1, Port mode register (PMR1).

Bit 7: Noise cancel (NOISE CANCEL)

This bit turns the IRQ0 noise canceller function on and off. In standby, watch, and subactive

modes the noise canceller function is off regardless of the setting of this bit.

Bit 7

NOISE CANCEL

Explanation

Noise canceller function is off.

(initial value)

Noise canceller function is on. Input is sampled at intervals of 256 states.

If two consecutive input values do not match, noise is assumed.

Bit 6: P16/EVENT pin function switch (EVENT)

This bit selects whether pin P16/EVENT is used as P16 or as EVENT.

Bit 6

EVENT

Explanation

0P16/EVENT pin functions as P16.*

(initial value)

1P16/EVENT pin functions as EVENT (timer D event input).

Note: * Even when pin P16/EVENT is used as P16, the timer D counter may increment when pin

P16 is read. If timer D is used the counter must be cleared by means of the CLR bit in

timer mode register D (TMD).

Bit 5: P15/IRQ5/TMOE pin function switch (IRQC5)

This bit selects whether pin P15/IRQ5/TMOE is used as P15/TMOE or as IRQ5.

Bit 5

IRQC5

Explanation

0P15/IRQ5/TMOE pin functions as P15/TMOE.

(initial value)

1P15/IRQ5/TMOE pin functions for IRQ5 input.

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HD6433713 Datasheet(PDF) 125 Page - Renesas Technology Corp