H8S2245 datasheet(327/818 Pages) RENESAS

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Section 9 16-Bit Timer Pulse Unit (TPU)

Rev.3.00 Mar. 26, 2007 Page 285 of 772

REJ09B0355-0300

Section 9 16-Bit Timer Pulse Unit (TPU)

9.1

Overview

The H8S/2245 Group has an on-chip 16-bit timer pulse unit (TPU) that comprises three 16-bit

timer channels.

9.1.1

Features

• Maximum 8-pulse input/output

• A total of 8 timer general registers (TGRs) are provided (four for channel 0 and two each for

channels 1, and 2), each of which can be set independently as an output compare/input capture

TGRC and TGRD for channel 0 can also be used as buffer registers

• Selection of 7 or 8 counter input clocks for each channel

• The following operations can be set for each channel:

 Waveform output at compare match: Selection of 0, 1, or toggle output

 Input capture function: Selection of rising edge, falling edge, or both edge detection

 Counter clear operation: Counter clearing possible by compare match or input capture

 Synchronous operation: Multiple timer counters (TCNT) can be written to simultaneously

Simultaneous clearing by compare match and input capture possible

 PWM mode: Any PWM output duty can be set

Maximum of 7-phase PWM output possible by combination with synchronous operation

• Buffer operation settable for channel 0

 Input capture register double-buffering possible

 Automatic rewriting of output compare register possible

• Phase counting mode settable independently for each of channels 1, and 2

 Two-phase encoder pulse up/down-count possible

• Fast access via internal 16-bit bus

 Fast access is possible via a 16-bit bus interface

• 13 interrupt sources

 For channel 0 four compare match/input capture dual-function interrupts and one overflow

interrupt can be requested independently

 For channels 1, and 2, two compare match/input capture dual-function interrupts, one

overflow interrupt, and one underflow interrupt can be requested independently

H8S2245 Datasheet(PDF) 327 Page - Renesas Technology Corp