HC05 datasheet(147/232 Pages) MOTOROLA

Part #	HC05

Description	High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

PDF	232 Pages

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Manufacturer	MOTOROLA [Motorola, Inc]

Direct Link	http://www.freescale.com

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147 / 232 page

MC68HC05X16

Rev. 1

MOTOROLA

10-13

RESETS AND INTERRUPTS

10.2.4

Hardware controlled interrupt sequence

The following three functions: reset, STOP and WAIT, are not in the strictest sense interrupts. However,

they are acted upon in a similar manner. Flowcharts for STOP and WAIT are shown in Figure 2-4.

RESET: A reset condition causes the program to vector to its starting address, which is contained

in memory locations $3FFE (MSB) and $3FFF (LSB). The I-bit in the condition code

STOP:

The STOP instruction puts the processor to ‘sleep’ and, if the MCAN module is already

in SLEEP mode, it causes the oscillator to be turned off until an external, WOI or CIRQ

interrupt occurs or the device is reset.

WAIT:

The WAIT instruction causes all processor clocks to stop, but leaves the timer clocks

running. This ‘rest’ state of the processor can be cleared by reset, an external or WOI

interrupt, a timer interrupt or an SCI interrupt. There are no special WAIT vectors for

these individual interrupts.

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HC05 Datasheet(PDF) 147 Page - Motorola, Inc