UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 276

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

274
Interrupt request pending
Interrupt request pending
Interrupt request pending
IE:
ISP:
IF:
MK: Interrupt mask flag
PR: Priority specification flag
Figure 14-11. Interrupt Request Acknowledgement Program Algorithm
Yes
Interrupt request flag
Flag that controls acknowledgement of maskable interrupt request (1 = Enable, 0 = Disable)
Flag that indicates the priority level of the interrupt currently being serviced (0 = Higher priority
interrupt servicing, 1 = No interrupt request acknowledged, or lower priority interrupt servicing)
No
of
priority of interrupt requests
Vectored interrupt
interrupt has highest
PR = 0 that are generated
at same time
servicing
IE = 1?
Which
CHAPTER 14 INTERRUPT FUNCTIONS
?
No
Yes
User’s Manual U13029EJ7V1UD
Yes (High priority)
No
No
priority of interrupt requests that
PR = 0 that are generated
interrupt has highest
Vectored interrupt
interrupt requests of
are generated at
at same time
same time
ISP = 1?
servicing
IE = 1?
MK = 0?
PR = 0?
Which
Start
IF = 1?
Any
?
?
Yes (Interrupt request generated)
Yes
No (Low priority)
No
No
Yes
Yes
No
No
Yes
Interrupt request pending
Interrupt request pending
Interrupt request pending
Interrupt request pending
Yes