Datasheet

Section 11 16-Bit Free-Running Timer (FRT)
Rev. 3.00 Mar 21, 2006 page 279 of 788
REJ09B0300-0300
Compare-match
signal
Input capture
mask signal
ICRD + OCRDM × 2
N
FRC N N + 1
φ
Figure 11.16 Timing of Input Capture Mask Signal Clearing
11.6 Interrupt Sources
The free-running timer can request seven interrupts: ICIA to ICID, OCIA, OCIB, and FOVI. Each
interrupt can be enabled or disabled by an enable bit in TIER. Independent signals are sent to the
interrupt controller for each interrupt. Table 11.2 lists the sources and priorities of these interrupts.
The ICIA, ICIB, OCIA, and OCIB interrupts can be used as the on-chip DTC activation sources.
Table 11.2 FRT Interrupt Sources
Interrupt Interrupt Source Interrupt Flag DTC Activation Priority
ICIA Input capture of ICRA ICFA Enabled High
ICIB Input capture of ICRB ICFB Enabled
ICIC Input capture of ICRC ICFC Disabled
ICID Input capture of ICRD ICFD Disabled
OCIA Compare match of OCRA OCFA Enabled
OCIB Compare match of OCRB OCFB Enabled
FOVI Overflow of FRC OVF Disabled Low