upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 187

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(10) Capture operation
(11) Compare operation
(b) Acknowledgement of TIn0 and TIn1 pins
(c) One-shot pulse output
(a) If the valid edge of TIn0 is specified for the count clock
(b) If both rising and falling edges are selected as the valid edge of TIn0, a capture operation is not
(c) To capture the signals correctly from TIn0 and TIn1
(d) Interrupt request input
(a) When rewriting CRn0 and CRn1 during timer operation
(b) When CRn0 and CRn1 are set to compare mode
Remark
Remark
Remark
When the timer is stopped, input signals to the TIn0 and TIn1 pins are not acknowledged, regardless of the
CPU operation.
The one-shot pulse output operates correctly only in free-running mode or in clear & start mode at the valid
edge of the TIn0 pin. The one-shot pulse cannot be output in the clear & start mode on a match of TMn and
CRn0 because an overflow does not occur.
When the valid edge of TIn0 is specified for the count clock, the capture register with TIn0 specified as a
trigger will not operate correctly.
The capture trigger needs a pulse longer than twice the count clock selected by prescaler mode registers n0
and n1 (PRMn0, PRMn1) in order to correctly capture the signals from TIn1 and TIn0.
Although a capture operation is performed a the falling edge of the count clock, interrupt request inputs
(INTTMn0, INTTMn1) are generated at the rising edge of the next count clock.
When rewriting 16-bit timer capture/compare registers n0 and n1 (CRn0, CRn1), if the value is close to or
larger than the timer value, the match interrupt request generation or clear operation may not be performed
correctly.
When CRn0 and CRn1 are set to compare mode, they do not perform a capture operation even if a capture
trigger is input.
performed.
n = 0, 1
n = 0, 1
n = 0, 1
CHAPTER 7 TIMER/COUNTER FUNCTION
User’s Manual U12768EJ4V1UD
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