h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 337

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

11.1
The H8S/2169 or H8S/2149 has a single-channel on-chip 16-bit free-running timer (FRT) module
that uses a 16-bit free-running counter as a time base. Applications of the FRT module include
rectangular-wave output (up to two independent waveforms), input pulse width measurement, and
measurement of external clock periods.
11.1.1
The features of the free-running timer module are listed below.
Selection of four clock sources
Two independent comparators
Four input capture channels
Counter can be cleared under program control
Seven independent interrupts
Special functions provided by automatic addition function
The free-running counter can be driven by an internal clock source ( /2, /8, or /32), or an
external clock input (enabling use as an external event counter).
Each comparator can generate an independent waveform.
The current count can be captured on the rising or falling edge (selectable) of an input
signal.
The four input capture registers can be used separately, or in a buffer mode.
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.
Overview
Features
Section 11 16-Bit Free-Running Timer
Rev. 3.00 Jan 18, 2006 page 309 of 1044
Section 11 16-Bit Free-Running Timer
REJ09B0280-0300
2, enabling