MC68HC912B32MFU8 MOTOROLA [Motorola, Inc], MC68HC912B32MFU8 Datasheet - Page 56

Manufacturer Part Number

MC68HC912B32MFU8

Description

16-Bit Microcontroller

Manufacturer

MOTOROLA [Motorola, Inc]

Datasheet

1.MC68HC912B32MFU8.pdf (128 pages)

After the CCR is stacked, the I bit (and the X bit, if an XIRQ interrupt service request is pending) is set

to prevent other interrupts from disrupting the interrupt service routine. The interrupt vector for the high-

est priority source that was pending at the beginning of the interrupt sequence is fetched, and execution

continues at the referenced location. At the end of the interrupt service routine, an RTI instruction re-

stores the content of all registers from information on the stack, and normal program execution re-

sumes. If another interrupt is pending at the end of an interrupt service routine, the register unstacking

and restacking is bypassed and the vector of the pending interrupt is fetched.

MOTOROLA

MC68HC912B32

MC68HC912B32TS/D