h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 339

• Manufacturer Part Number: h8s-2158
• Description: Renesas 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.
12.1
Figure 12.1 shows a block diagram of the FRT.
TIM8FR1A_000020020300
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
One of the three internal clocks ( /2, /8, or /32), or an external clock input can be
selected (enabling use as an external event counter).
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
can be requested independently.
The contents of OCRAR and OCRAF can be added to the contents of OCRA
automatically, enabling a periodic waveform to be generated without software intervention.
The contents of ICRD can be added automatically to the contents of OCRDM
input capture operations in this interval to be restricted.
Features
Section 12 16-Bit Free-Running Timer (FRT)
Section 12 16-Bit Free-Running Timer (FRT)
Rev. 3.00 Jan 25, 2006 page 287 of 872
REJ09B0286-0300
2, enabling