L9803 datasheet(27/126 Pages) STMICROELECTRONICS

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L9803

Clocks, Reset, Interrupts & Power saving modes

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3.6

Interrupts

A list of interrupt sources is given in Table 4 below, together with relevant details for each

source. Interrupts are serviced according to their order of priority, starting with I0, which has

the highest priority, and so to I12, which has the lowest priority.

The following list describes the origins for each interrupt level:

–

I0 connected to Ports PA0-PA7, PB0-PB1

–

I1 connected to CAN

–

I2 connected to Power Diagnostics

–

I3 connected to Output Compare of Timer 1

–

I4 connected to Input Capture of TImer 1

–

I5 connected to Timer 1 Overflow

–

I6 connected to Output Compare of Timer 2

–

I7 connected to Input Capture of TImer 2

–

I8 connected to Timer 2 Overflow

–

I9 connected to ADC End Of Conversion

–

I10 connected to PWM 1 Overflow

–

I11 connected to PWM 2 Overflow

–

I12 connected to EEPROM

Exit from Halt mode may only be triggered by an External Interrupt on one of the following

ports: PA0-PA7 (I0), PB0-PB1 (I0), or by an Internal Interrupt coming from CAN peripheral

(I1).

If more than one input pin of a group connected to the same interrupt line are selected

simultaneously, the OR of this signals generates the interrupt.

Table 4.

Interrupt Mapping

Interrupts

Flag name

Interrupt

source

Vector

Address

Reset

N/A

FFFEh-FFFFh

Software

N/A

FFFCh-FFFDh

Ext. Interrupt (Ports PA0-PA7, PB0-

PB1)

N/A

FFFAh-FFFBh

Receive Interrupt Flag

CAN Status

RXIFi

FFF8h-FFF9h

Transmit Interrupt Flag

TXIF

Error Interrupt Pending

EPND

Power Bridge Short Circuit

Bridge Control

Status

FFF6h-FFF7h

Overtemperature

OVT

Output Compare 1

Timer 1 Status

OCF1_1

FFF4h-FFF5h

Output Compare 2

OCF2_1

Input Capture 1

Timer 1 Status

ICF1_1

FFF2h-FFF3h

Input Capture 2

ICF2_1

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