HD6433713 datasheet(129/324 Pages) RENESAS

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7.3.3 Pin Functions

Table 7-9 shows the port 1 pin functions.

Table 7-9 Port 1 Pin Functions

Pin Functions and Selection Method

P17/Vdisp

Selected by mask option

P17 high-voltage input pin

Power supply for VFD driving (Vdisp)

P16/EVENT

Function is switched as follows by EVENT bit in PMR1

EVENT

Pin function

P16 input pin

EVENT input pin*

Note: Timer D event input

Function is switched as follows by bits IRQC5, IRQC4, IRQC1, and IRQC0* in

PMR1 and bit n in PCR1

PMR1

PCR1n

—

Pin function

P1n input pin P1n output pin

IRQn input pin

Notes: 1. Before switching pin functions using bits IRQC5, IRQC4, IRQC1, and

IRQC0 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).

2. Before entering power-down mode, pins set to external interrupt

input by bits IRQC5, IRQC4, IRQC1, and IRQC0 in PMR1, should be

kept from floating by external connection, or should be switched to

general I/O in PMR1 prior to the state transition.

3. For details on the TMOE function, refer to section 7.3.2 (4), Port

mode register 4 (PMR4). IRQ4, IRQ1, and IRQ0 input can be set for

either rising edge or falling edge detection by register IEGR. For

details, refer to section 3.2.3 (2), IRQ edge select register (IEGR).

IRQ0 and IRQ1 can be used as event input pins for timer B and

timer C, respectively. For details, refer to section 8, Timers.

P15/IRQ5/TMOE,

P14/IRQ4,

P11/IRQ1,

P10/IRQ0

118

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