The 331x has three major sets of interrupts; FIQ, IRQ (passed directly to the MCU) and the CContInts which are cascaded via IRQ 2.
FIQ and IRQ have 9 instead of 8 because both have an extra one (either external or internal to the Interrupt Controller)
| Num | Reason |
|---|---|
| FIQ 8 | ct_timer (?) Something with EM and DEVIO |
| FIQ 7 | SIMCardDetX (Battery removed) |
| FIQ 6 | SIM UART |
| FIQ 5 | Another timer Generated when the value of I/O 0x04 reaches 0. |
| FIQ 4 | Programmable timer See timers section |
| FIQ 3 | MBUS TxD ready? |
| FIQ 2 | MBUS RxD ready |
| FIQ 1 | MDISND queue empty |
| FIQ 0 | MDIRCV new data in queue |
| Num | Reason |
|---|---|
| IRQ 8 | NOP (No Operation - disables itself) |
| IRQ 7 | NOP (No Operation) |
| IRQ 6 | HEADDET |
| IRQ 5 | HOOKDET |
| IRQ 4 | DSP |
| IRQ 3 | Wake up from sleep |
| IRQ 2 | CContINT |
| IRQ 1 | NOP |
| IRQ 0 | Keyboard |
| Num | Reason |
|---|---|
| INT 3 | CHARGER |
| INT 4 | RTC-SEC |
| INT 5 | RTC-MIN |
| INT 6 | RTC-DAY |
| INT 7 | RTC-ALR |
Last updated: 2005-02-21 14:19
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