UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 230

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

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Table 6-3. Function of Capture/Compare Register in Each Mode and How to Write Compare Register
Interval timer
External event counter
External trigger pulse output
One-shot pulse output
PWM output
Free-running timer
Pulse width measurement
(a) Function as compare register
(b) Function as capture register
The following table shows the functions of the capture/compare register in each mode, and how to write data to
the compare register.
The TPnCCR1 register can be rewritten even when the TPnCTL0.TPnCE bit = 1.
The set value of the TPnCCR1 register is transferred to the CCR1 buffer register. When the value of the
16-bit counter matches the value of the CCR1 buffer register, a compare match interrupt request signal
(INTTPnCC1) is generated. If TIOPn1 pin output is enabled at this time, the output of the TIOPn1 pin is
inverted.
When the TPnCCR1 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 TPnCCR1 register if the valid edge of the capture trigger input pin
(TIOPn1 pin) is detected. In the pulse-width measurement mode, the count value of the 16-bit counter is
stored in the TPnCCR1 register and the 16-bit counter is cleared (0000H) if the valid edge of the capture
trigger input pin (TIOPn1) is detected.
Even if the capture operation and reading the TPnCCR1 register conflict, the correct value of the
TPnCCR1 register can be read.
Operation Mode
CHAPTER 6 16-BIT TIMER/EVENT COUNTER P (TMP)
Preliminary User’s Manual U19748EJ1V0UD
Compare register
Compare register
Compare register
Compare register
Compare register
Capture/compare register
Capture register
Capture/Compare Register
Anytime write
Anytime write
Batch write
Anytime write
Batch write
Anytime write
How to Write Compare Register