SH7760 Datasheet, PDF (588/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

16.4.4 16-Bit Timer: Input Capture
When operating in input capture mode, the 16-bit counters will be free-running using the clocks
defined by the timer clock control bits. When an active edge defined by the pin active control bit is
received, the channel time will be set to the value of that channel's 16-bit counter and the interrupt
edge bit will be set. The counter will then be reset to H'0000 and will begin counting again. The
counters will retain their values or can be cleared to H'0000 by disabling the timer enable bits.
Channel 0 is always enabled for this mode. The other three channels will be enabled if they use the
same clock source as channel 0.
Common between channels
Clock
generation
CMT_CTR
16-bit counter
Peripheral bus
Edge
detection
Channel time register
Edge
control
IRQ
Figure 16.6 16-Bit Timer Mode: Input Capture
Rev. 1.0, 02/03, page 538 of 1294