Motorola MC68HC05RC16, MC68HC05RC8 manual 54

Low-Power Modes

OSC11

tRL

RESET

2

tLIH

IRQ

3

tILCH

4064 tCYC

IRQ

INTERNAL

CLOCK

INTERNAL

ADDRESS

3FFE

3FFE

3FFE

3FFE

3FFF

BUS

NOTES:

RESET OR INTERRUPT

1.

Represents the internal gating of the OSC1 pin

2.

pin edge-sensitive mask option

VECTOR FETCH

IRQ

3.

IRQ

pin level and edge-sensitive mask option

Figure 6-1. Stop Recovery Timing Diagram

6.4 Stop Recovery

The processor can be brought out of stop mode only by an external interrupt, LPRST, or RESET. Refer to Figure 6-1.

NOTE: If an external interrupt is pending when stop mode is entered, then stop mode will be exited immediately.

6.5 Wait Mode

The WAIT instruction places the MCU in a low power-consumption mode, but wait mode consumes more power than stop mode. All CPU action is suspended, but the core timer, the oscillator, and any enabled module remain active. Any interrupt or reset will cause the MCU to exit wait mode. The user must shut off subsystems to reduce power

General Release Specification		MC68HC05RC16 — Rev. 3.0
54	Low-Power Modes	MOTOROLA