AM8530H AMD [Advanced Micro Devices], AM8530H Datasheet - Page 40

• Manufacturer Part Number: AM8530H
• Description: Serial Communications Controller
• Manufacturer: AMD [Advanced Micro Devices]

I/O Programming Functional Description
No
CPU Service (IUS = 1)
(Option) Check Other
Reset IUS and EXIT
Unit Selected for
Internal IP, Bits,
Yes
Complete
Service
Routine
?
Figure 3–5. Interrupt Protocol
No
No
No
No
No
Decode (INTACK = L)
CPU Services Higher
Peripheral Requests
Settles (Wait for DS)
CPU Initiates Status
IEI/IEO Daisy Chain
Enable Pin Active
Interrupt (INT = L)
Priority Peripheral
Priority Peripheral
Interrupt Enables
Interrupt Pending
Interrupt Enable
Disabled Unit?
Still Pending
Set (IP = 1)
Yes
Has Higher
Yes
Yes
Yes
Peripheral
Condition
Yes
(MIE = 1)
Complete
Interrupt
(IEx = 1)
(IEI = H)
Interrupt
Specific
(IEI = L)
Service
(IP = 1)
Priority
Master
Start
Exits
IS
?
?
?
?
?
?
No
Yes
Yes
No
AMD
3–9