HD6417751 Datasheet, PDF (342/1105 Pages) Renesas Technology Corp – SuperH RISC engine

TCNT value
TCOR
TCOR value set in TCNT
on underflow
H'00000000
TCLK
Time
TCPR2
TCNT value set
TICPI2
Figure 12.7 Operation Timing when Using Input Capture Function
12.4 Interrupts
There are four TMU interrupt sources, comprising underflow interrupts and the input capture
interrupt (when the input capture function is used). Underflow interrupts are generated on
channels 0 to 4, and input capture interrupts on channel 2 only.
An underflow interrupt request is generated (on an individual channel basis) when TCR.UNF = 1
and the channel’s interrupt enable bit is 1.
When the input capture function is used and an input capture request is generated, an interrupt is
requested if the input capture input flag (ICPF) in TCR2 is 1 and the input capture control bits
(ICPE1, ICPE0) in TCR2 are 11.
The TMU interrupt sources are summarized in table 12.3.
Rev. 3.0, 04/02, page 302 of 1064