XC68HC11A8MFS4 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

XC68HC11A8MFS4

ROM-based high-performance microcontrollers

Freescale Semiconductor 

Freescale Semiconductor, Inc.

2A

Y

BIT I IN

CCR = 1?

N

ANY I-BIT Y

INTERRUPT

PENDING?

N

FETCH OPCODE

STACK CPU

REGISTERS

STACK CPU

REGISTERS

SET BIT I IN CCR

FETCH VECTOR

$FFF8, $FFF9

Y

ILLEGAL

OPCODE?

N

WAI

Y

INSTRUCTION?

N

STACK CPU

REGISTERS

SET BIT I IN CCR

Y

SWI

INSTRUCTION?

N

FETCH VECTOR

$FFF6, $FFF7

Y

RTI

INSTRUCTION?

RESTORE CPU

REGISTERS

FROM STACK

N

EXECUTE THIS

INSTRUCTION

STACK CPU

REGISTERS

N

ANY

INTERRUPT

PENDING?

Y

SET BIT I IN CCR

RESOLVE INTERRUPT

PRIORITY AND FETCH

VECTOR FOR HIGHEST

PENDING SOURCE

SEE FIGURE 5–2

1A

FLOW OUT OF RESET P2

Figure 5-1 Processing Flow out of Reset (2 of 2)

TECHNICAL DATA

RESETS AND INTERRUPTS

For More Information On This Product,

Go to: www.freescale.com

5-13

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