M16CSLASH29 datasheet(85/499 Pages) RENESAS

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7. Clock Generation Circuit

page 61

Table 7.6 Interrupts to Exit Wait Mode

Interrupt

CM02 = 0

CM02 = 1

NMI interrupt

Available

Serial I/O interrupt

Available when internal and external

Available when external clock is used

clocks are used

Multi-master I2C interrupt

Available

Do not used

Key input interrupt

Available

A/D conversion interrupt

Available in one-shot or single sweep

Do not use

mode

Timer A interrupt

Available in all modes

Available in event counter mode or when

Timer B interrupt

count source is fC32

Timer S interrupt

Available in all modes

Do not use

_______

INT interrupt

Available

CAN0 wake_up interrupt

Available in CAN sleep mode

7.6.2.3 Pin Status During Wait Mode

Table 7.5

lists pin status during wait mode.

Table 7.5 Pin Status in Wait Mode

Status

I/O ports

Retains status before wait mode

When fC selected

Does not stop

CLKOUT

When f1, f8, f32 selected

Does not stop when the CM02 bit is set to 0

Retains status before wait mode when the CM02 bit is set to 1

To use peripheral function interrupts to exit wait mode, set the followings before executing the WAIT

instruction.

1. Set the interrupt priority level to the bits ILVL2 to ILVL0 in the interrupt control register of the periph-

eral function interrupts that are used to exit wait mode. Also, set bits ILVL2 to ILVL0 of all peripheral

function interrupts that are not used to exit wait mode to 0002 (interrupt disabled).

2. Set the I flag to 1.

3. Operate the peripheral functions that are used to exit wait mode.

When the peripheral function interrupts are used to exit wait mode, an interrupt routine is executed

after an interrupt request is generated and the CPU is clocked.

The CPU clock used when exiting wait mode by a peripheral function interrupt is the same CPU clock

that is used when executing the WAIT instruction.

7.6.2.4 Exiting Wait Mode

______

The MCU exits from wait mode by a hardware reset, NMI interrupt, or peripheral function interrupt.

______

If wait mode is exited by a hardware reset or NMI interrupt, set the peripheral function interrupt priority

bits ILVL2 to ILVL0 to 0002 (interrupts disabled) before executing the WAIT instruction.

The CM02 bit affects the peripheral function interrupts. If the CM02 bit is 0 (peripheral function clocks

not turned off during wait mode), all peripheral function interrupts can be used to exit wait mode. If the

CM02 bit is 1 (peripheral function clock stops during wait mode), the peripheral functions using the

peripheral function clock stops operating, so that only the peripheral functions clocked by external sig-

nals can be used to exit wait mode.

Table 7.6

lists the interrupts to exit wait mode.

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