Datasheet

V850ES/JG3 CHAPTER 8 16-BIT TIMER/EVENT COUNTER Q (TMQ)
R01UH0015EJ0300 Rev.3.00 Page 292 of 870
Sep 30, 2010
(a) Function as compare register
The TQ0CCR2 register can be rewritten even when the TQ0CTL0.TQ0CE bit = 1.
The set value of the TQ0CCR2 register is transferred to the CCR2 buffer register. When the value of the 16-bit
counter matches the value of the CCR2 buffer register, a compare match interrupt request signal (INTTQ0CC2)
is generated. If TOQ02 pin output is enabled at this time, the output of the TOQ02 pin is inverted.
(b) Function as capture register
When the TQ0CCR2 register is used as a capture register in the free-running timer mode, the count value of
the 16-bit counter is stored in the TQ0CCR2 register if the valid edge of the capture trigger input pin (TIQ02
pin) is detected. In the pulse-width measurement mode, the count value of the 16-bit counter is stored in the
TQ0CCR2 register and the 16-bit counter is cleared (0000H) if the valid edge of the capture trigger input pin
(TIQ02 pin) is detected.
Even if the capture operation and reading the TQ0CCR2 register conflict, the correct value of the TQ0CCR2
register can be read.
The following table shows the functions of the capture/compare register in each mode, and how to write data to the
compare register.
Table 8-4. Function of Capture/Compare Register in Each Mode and How to Write Compare Register
Operation Mode Capture/Compare Register How to Write Compare Register
Interval timer Compare register Anytime write
External event counter Compare register Anytime write
External trigger pulse output Compare register Batch write
One-shot pulse output Compare register Anytime write
PWM output Compare register Batch write
Free-running timer Capture/compare register Anytime write
Pulse width measurement Capture register
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