PC912XDP512F0MPVR datasheet(361/1348 Pages) FREESCALE

361 / 1348 page

Chapter 7 Enhanced Capture Timer (S12ECT16B8CV2)

MC9S12XDP512 Data Sheet, Rev. 2.21

Freescale Semiconductor

361

7.4.3

Interrupts

This section describes interrupts originated by the ECT block. The MCU must service the interrupt

requests. Table 7-37 lists the interrupts generated by the ECT to communicate with the MCU.

Table 7-37. ECT Interrupts

The ECT only originates interrupt requests. The following is a description of how the module makes a

request and how the MCU should acknowledge that request. The interrupt vector offset and interrupt

number are chip dependent.

7.4.3.1

Channel [7:0] Interrupt

This active high output will be asserted by the module to request a timer channel 7–0 interrupt to be

serviced by the system controller.

7.4.3.2

Modulus Counter Interrupt

This active high output will be asserted by the module to request a modulus counter underﬂow interrupt

to be serviced by the system controller.

7.4.3.3

Pulse Accumulator B Overﬂow Interrupt

This active high output will be asserted by the module to request a timer pulse accumulator B overﬂow

interrupt to be serviced by the system controller.

7.4.3.4

Pulse Accumulator A Input Interrupt

This active high output will be asserted by the module to request a timer pulse accumulator A input

interrupt to be serviced by the system controller.

7.4.3.5

Pulse Accumulator A Overﬂow Interrupt

This active high output will be asserted by the module to request a timer pulse accumulator A overﬂow

interrupt to be serviced by the system controller.

7.4.3.6

Timer Overﬂow Interrupt

This active high output will be asserted by the module to request a timer overﬂow interrupt to be serviced

by the system controller.

Interrupt Source

Description

Timer channel 7–0

Active high timer channel interrupts 7–0

Modulus counter underﬂow

Active high modulus counter interrupt

Pulse accumulator B overﬂow

Active high pulse accumulator B interrupt

Pulse accumulator A input

Active high pulse accumulator A input interrupt

Pulse accumulator A overﬂow

Pulse accumulator overﬂow interrupt

Timer overﬂow

Timer 0verﬂow interrupt

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