dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 131

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

Note 1: INST 3 may be executed at that point only if the preceding instruction (INST 2)
was a single-word instruction.
Note 2: II=Interrupt instruction from maskable interrupt.
The following program flow will not occur because the new interrupt mask level becomes
effective after a pipeline latency of four instruction cycles:
MOTOROLA
1. Program flow without interrupts after interrupts are re-enabled:
2. Program flow with interrupts after interrupts are re-enabled:
ORI #03,MR
INST 1
INST 2
INST 3
INST 4
II
II+1
ANDI #00,MR
INST 1
INST 2
INST 3
INST 4
ANDI #00,MR
INST 1
INST 2
INST 3
INST 4
II
II+1
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Freescale Semiconductor, Inc.
For More Information On This Product,
NORMAL PROCESSING STATE
;Disable interrupts.
;Interrupts disabled.
;Interrupts disabled.
;Enable interrupts
;Enable interrupts
;Uninterruptable
;Uninterruptable
;II fetched
;II+1 fetched
PROCESSING STATES
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