Addendum for Revision 1.0
MPC5565 Reference Manual Addendum, Rev. 2
Freescale Semiconductor
13
.
Raised Priority Preserved Timing Diagram
Table 1. MPC5565RM Rev 1.0 addendum (continued)
Location
Description
Last In / First Out
Entry in LIFO
Write
INTC_CPR
Clock
Interrupt Request
to Processor
Hardware Vector
Enable
Interrupt
Acknowledge
Interrupt Vector
Read
INTC_IACKR
Write
INTC_EOIR
INTVEC in
INTC_IACKR
PRI in
INTC_CPR
Peripheral Interrupt
Request 100
0
108
1
208
2
3
Peripheral Interrupt
Request 200
0
3
0
3
A
B
C
D
E
F
G
H
I
Raised Priority Preserved Events
Event
Description
A
Peripheral interrupt request 200 asserts during execution of ISR108 running at
priority 1.
B
Interrupt request to processor asserts. INTVEC in INTC_IACKR updates with vector
for that peripheral interrupt request.
C
ISR108 writes to INTC_CPR to raise priority to 3 before accessing shared coherent
data block.
D
PRI in INTC_CPR now at 3, reflecting the write. This write, just before accessing
data block, is the last instruction the processor executes before being interrupted.
E
Interrupt exception handler prolog acknowledges interrupt by reading INTC_IACKR.
F
PRI of 3 pushed onto LIFO. PRI in INTC_CPR updates to 2, the priority of ISR208.
G
ISR208 clears its flag bit, deasserting its peripheral interrupt request.
H
Interrupt exception handler epilog writes to INTC_EOIR.
I
LIFO pops 3, restoring the raised priority onto PRI in INTC_CPR. Next value to pop
from LIFO is the priority from before peripheral interrupt request 100 interrupted.
ISR108 now can access data block coherently after interrupt exception handler
executes rfi instruction.
Содержание MPC5565
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Страница 515: ...External Bus Interface EBI MPC5565 Microcontroller Reference Manual Rev 1 0 12 70 Freescale Semiconductor...
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Страница 895: ...Deserial Serial Peripheral Interface DSPI MPC5565 Microcontroller Reference Manual Rev 1 0 19 72 Freescale Semiconductor...
Страница 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
Страница 1145: ...MPC5565 Register Map MPC5565 Microcontroller Reference Manual Rev 1 0 A 60 Freescale Semiconductor...
Страница 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...