S912XEG384J3VA Datasheet, PDF (577/1324 Pages) Freescale Semiconductor, Inc – MC9S12XEP100 Reference Manual Covers MC9S12XE Family

Chapter 14 Enhanced Capture Timer (ECT16B8CV3)
14.4.2 Reset
The reset state of each individual bit is listed within the register description section (Section 14.3,
“Memory Map and Register Definition”) which details the registers and their bit-fields.
14.4.3 Interrupts
This section describes interrupts originated by the ECT block. The MCU must service the interrupt
requests. Table 14-39 lists the interrupts generated by the ECT to communicate with the MCU.
Table 14-39. ECT Interrupts
Interrupt Source
Timer channel 7–0
Modulus counter underflow
Pulse accumulator B overflow
Pulse accumulator A input
Pulse accumulator A overflow
Timer overflow
Description
Active high timer channel interrupts 7–0
Active high modulus counter interrupt
Active high pulse accumulator B interrupt
Active high pulse accumulator A input interrupt
Pulse accumulator overflow interrupt
Timer 0verflow interrupt
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.
14.4.3.1 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.
14.4.3.2 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.
14.4.3.3 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.
14.4.3.4 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.
MC9S12XE-Family Reference Manual Rev. 1.25
Freescale Semiconductor
577