HD6413008VF25 Datasheet, PDF (314/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

9. 8-Bit Timers
Caution
Do not set 16-bit counter mode and compare match count mode simultaneously within the same
group, as the 8TCNT input clock will not be generated and the counters will not operate.
9.4.6 Input Capture Setting
The 8TCNT value can be transferred to TCORB on detection of an input edge on the input
capture/output compare pin (TMIO₁ or TMIO₃). Rising edge, falling edge, or both edge detection
can be selected. In 16-bit count mode, 16-bit input capture can be used.
Setting Input Capture Operation in 8-Bit Timer Mode (Normal Operation)
• Channel 1:
⎯ Set TCORB1 as an 8-bit input capture register with the ICE bit in 8TCSR1.
⎯ Select rising edge, falling edge, or both edges as the input edge(s) for the input capture
signal (TMIO₁) with bits OIS3 and OIS2 in 8TCSR1.
⎯ Select the input clock with bits CKS2 to CKS0 in 8TCR1, and start the 8TCNT count.
• Channel 3:
⎯ Set TCORB3 as an 8-bit input capture register with the ICE bit in 8TCSR3.
⎯ 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 8TCSR3.
⎯ Select the input clock with bits CKS2 to CKS0 in 8TCR3, and start the 8TCNT count.
Note:
When TCORB1 in channel 1 is used for input capture, TCORB0 in channel 0 cannot be
used as a compare match register.
Similarly, when TCORB3 in channel 3 is used for input capture, TCORB2 in channel 2
cannot be used as a compare match register.
Setting Input Capture Operation in 16-Bit Count Mode
• Channels 0 and 1:
⎯ In 16-bit count mode, TCORB0 and TCORB1 function as a 16-bit input capture register
when the ICE bit is set to 1 in 8TCSR1.
⎯ Select rising edge, falling edge, or both edges as the input edge(s) for the input capture
signal (TMIO₁) with bits OIS3 and OIS2 in 8TCSR0. (In 16-bit count mode, the settings of
bits OIS3 and OIS2 in 8TCSR1 are ignored.)
⎯ Select the input clock with bits CKS2 to CKS0 in 8TCR1, and start the 8TCNT count.
• Channels 2 and 3:
⎯ In 16-bit count mode, TCORB2 and TCORB3 function as a 16-bit input capture register
when the ICE bit is set to 1 in 8TCSR3.
Rev.4.00 Aug. 20, 2007 Page 268 of 638
REJ09B0395-0400