HD6432670 Hitachi, HD6432670 Datasheet - Page 645

• Manufacturer Part Number: HD6432670
• Description: (HD64F267x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

This LSI has an on-chip 8-bit timer module with two 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.
13.1
TIMH260A_000020020400
Selection of four clock sources
The counters can be driven by one of three internal clock signals (ø/8, ø/64, or ø/8192) or an
external clock input
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 control by a combination of two compare match signals
The timer output signal in each channel is controlled by a combination of two independent
compare match signals, enabling the timer to generate output waveforms with an arbitrary duty
cycle or PWM output
Provision for cascading of two channels (TMR_0 and TMR_1)
Operation as a 16-bit timer is possible, using TMR_0 for the upper 8 bits and TMR_1 for the
lower 8 bits (16-bit count mode)
TMR_1 can be used to count TMR_0 compare matches (compare match count mode)
Three independent interrupts
Compare match A and B and overflow interrupts can be requested independently
A/D converter conversion start trigger can be generated
Features
Section 13 8-Bit Timers (TMR)
Rev. 2.0, 04/02, page 599 of 906