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| Z51F3220FNX Datasheet, PDF (89/312 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers | |||
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Z51F3220
Product Specification
1
IE.EA Flag ï 0
Program Counter low Byte
2
SP ï SP + 1
M(SP) ï (PCL)
Saves PC value in order to continue
process again after executing ISR
Program Counter high Byte
3
SP ï SP + 1
M(SP) ï (PCH)
4
Interrupt Vector Address occurrence
(Interrupt Vector Address)
5
ISR(Interrupt Service Routine) move,
execute
6
Return from ISR
RETI
7
Program Counter high Byte recovery
(PCH) ï (SP-1)
8
Program Counter low Byte recovery
(PCL) ï (SP-1)
9
IE.EA Flag ï 1
10
Main Program execution
Figure 10.3 Interrupt Vector Address Table
PS029902-0212
PRELIMINARY
86
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