Datasheet

Section 12 8-Bit Timers
Rev. 4.00 Jun 06, 2006 page 333 of 1004
REJ09B0301-0400
12.4 Interrupt Sources
The TMR0, TMR1, and TMRY 8-bit timers can generate three types of interrupt: compare-match
A and B (CMIA and CMIB), and overflow (OVI). TMRX can generate only an ICIX interrupt. An
interrupt is requested when the corresponding interrupt enable bit is set in TCR or TCSR.
Independent signals are sent to the interrupt controller for each interrupt. It is also possible to
activate the DTC by means of CMIA and CMIB interrupts from TMR0, TMR1, and TMRY.
An overview of 8-bit timer interrupt sources is given in tables 12.4 to 12.6.
Table 12.4 TMR0 and TMR1 8-Bit Timer Interrupt Sources
Interrupt source Description DTC Activation Interrupt Priority
CMIA Requested by CMFA Possible High
CMIB Requested by CMFB Possible
OVI Requested by OVF Not possible Low
Table 12.5 TMRX 8-Bit Timer Interrupt Source
Interrupt source Description DTC Activation
ICIX Requested by ICF Not possible
Table 12.6 TMRY 8-Bit Timer Interrupt Sources
Interrupt source Description DTC Activation Interrupt Priority
CMIA Requested by CMFA Possible High
CMIB Requested by CMFB Possible
OVI Requested by OVF Not possible Low