HD6413008VF25 Datasheet, PDF (315/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

9. 8-Bit Timers
⎯ Select rising edge, falling edge, or both edges as the input edge(s) for the input capture
signal (TMIO₃) with bits OIS3 and OIS2 in 8TCSR2. (In 16-bit count mode, the settings of
bits OIS3 and OIS2 in 8TCSR3 are ignored.)
⎯ Select the input clock with bits CKS2 to CKS0 in 8TCR3, and start the 8TCNT count.
9.5 Interrupt
9.5.1 Interrupt Sources
The 8-bit timer unit can generate three types of interrupt: compare match A and B (CMIA and
CMIB) and overflow (TOVI). Table 9.5 shows the interrupt sources and their priority order. Each
interrupt source is enabled or disabled by the corresponding interrupt enable bit in 8TCR. A
separate interrupt request signal is sent to the interrupt controller by each interrupt source.
Table 9.5 Types of 8-Bit Timer Interrupt Sources and Priority Order
Interrupt Source
CMIA
CMIB
TOVI
Description
Interrupt by CMFA
Interrupt by CMFB
Interrupt by OVF
Priority
High
Low
For compare match interrupts CMIA1/CMIB1 and CMIA3/CMIB3 and the overflow interrupts
(TOVI0/TOVI1 and TOVI2/TOVI3), one vector is shared by two interrupts.
Table 9.6 lists the interrupt sources.
Rev.4.00 Aug. 20, 2007 Page 269 of 638
REJ09B0395-0400