h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 291

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

TIMH263A_000020020300
This LSI has an on-chip 8-bit timer module with four channels operating on the basis of an 8-bit
counter.
The 8-bit timer module can be used to count external events and be used as a multifunction timer
in a variety of applications, such as generation of counter reset, interrupt requests, and pulse output
with an arbitrary duty cycle using a compare-match signal with two registers.
11.1
Selection of clock sources
Selected from three internal clocks ( /8, /64, and /8192) and an external clock.
Selection of three ways to clear the counters
The counters can be cleared on compare-match A or B, or by an external reset signal.
Timer output controlled by two compare-match signals
The timer output signal in each channel is controlled by two independent compare-match
signals, enabling the timer to be used for various applications, such as the generation of pulse
output or PWM output with an arbitrary duty cycle.
Cascading of the two channels
Multiple interrupt sources for each channel
Two compare-match interrupts and one overflow interrupt can be requested independently.
Generation of A/D conversion start trigger
Channel 0 compare-match A signal can be used as the A/D conversion start trigger.
Module stop mode can be set
At initialization, the 8-bit timer operation is halted. Register access is enabled by canceling the
module stop mode.
Cascading of TMR_1 and TMR_0
The module can operate as a 16-bit timer using TMR_0 as the upper half and TMR_1 as
the lower half (16-bit count mode).
TMR_1 can be used to count TMR_0 compare-match occurrences (compare-match count
mode).
Cascading of TMR_3 and TMR_2
The module can operate as a 16-bit timer using TMR_2 as the upper half and TMR_3 as
the lower half (16-bit count mode).
TMR_3 can be used to count TMR_2 compare-match occurrences (compare-match count
mode).
Features
Section 11 8-Bit Timers
Rev. 3.00 Oct 04, 2005 page 251 of 598
Section 11 8-Bit Timers
REJ09B0155-0300