p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 253

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

This LSI has an on-chip 16-bit free-running timer (FRT). The FRT operates on the basis of the 16-
bit free-running counter (FRC), and outputs two independent waveforms, and measures the input
pulse width and external clock periods.
11.1
• Selection of four clock sources
• Two independent comparators
• Four independent input capture channels
• Counter clearing
• Seven independent interrupts
• Special functions provided by automatic addition function
Figure 11.1 shows a block diagram of the FRT.
TIM8FR1A_000020020300
 One of the three internal clocks (φ/2, φ/8, or φ/32), or an external clock input can be
 Two independent waveforms can be output.
 The rising or falling edge can be selected.
 Buffer modes can be specified.
 The free-running counters can be cleared on compare-match A.
 Two compare-match interrupts, four input capture interrupts, and one overflow interrupt
 The contents of OCRAR and OCRAF can be added to the contents of OCRA
selected (enabling use as an external event counter).
can be requested independently.
automatically, enabling a periodic waveform to be generated without software intervention.
The contents of ICRD can be added automatically to the contents of OCRDM × 2, enabling
input capture operations in this interval to be restricted.
Features
Section 11 16-Bit Free-Running Timer (FRT)
Section 11 16-Bit Free-Running Timer (FRT)
Rev. 1.00 Sep. 21, 2006 Page 215 of 658
REJ09B0310-0100