Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 8 16-BIT TIMER/EVENT COUNTER AB (TAB)
R01UH0042EJ0500 Rev.5.00 Page 349 of 1513
Aug 12, 2011
(a) Function as compare register
The TABnCCR3 register can be rewritten even when the TABnCTL0.TABnCE bit = 1.
The set value of the TABnCCR3 register is transferred to the CCR3 buffer register. When the value of the 16-
bit counter matches the value of the CCR3 buffer register, a compare match interrupt request signal
(INTTABnCC3) is generated. If TOABn3 pin output is enabled at this time, the output of the TOABn3 pin is
inverted.
(b) Function as capture register
When the TABnCCR3 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 TABnCCR3 register if the valid edge of the capture trigger input pin (TIABn3
pin) is detected. In the pulse width measurement mode, the count value of the 16-bit counter is stored in the
TABnCCR3 register and the 16-bit counter is cleared (0000H) if the valid edge of the capture trigger input pin
(TIABn3 pin) is detected.
Even if the capture operation and reading the TABnCCR3 register conflict, the correct value of the TABnCCR3
register can be read.
Remark n = 0, 1
The following table shows the functions of the capture/compare register in each mode, and how to write data to the
compare register.
Table 8-5. 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
−
Triangular wave PWM mode Compare register Batch write