Datasheet

Section 1 Overview
Page 6 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
Type
Module/
Function Description
16-bit timer
pulse unit (TPU)
• 16-bit timer × 12 channels (general pulse timer unit)
• Eight counter input clocks can be selected for each channel
• Maximum 16-pulse input/output (when external expanded
mode is set)
• Maximum 32-pulse input/output (when single-chip mode is
set)
• Counter clear operation, simultaneous write to multiple timer
counters (TCNT), simultaneous clearing by compare match
and input capture, register simultaneous input/output possible
by counter synchronous operation, and maximum of 15-phase
PWM output by combination with synchronous operation
• Buffer operation, phase counting mode (two-phase encoder
input), and cascaded operation settable for channels
• Input capture function
• Output compare function (waveform output at compare match)
8-bit timer (TMR)
• 8-bit timer × 2 channels (operation as a 16-bit timer is also
possible)
• Selection of seven clock sources: Six internal clock signals or
an external clock input
• Pulse output with an arbitrary duty cycle or PWM output
Timer
Programmable
pulse generator
(PPG)
• 16-bit pulse output
• Pulse outputs are divided into four groups
Non-overlap mode is available
Inverted output can be specified
• Can operate together with the data transfer controller (DTC)
and DMA controller (DMAC)
Watchdog
timer
Watchdog timer
(WDT)
• 8-bit timer × 1 channel (eight counter input clocks can be
selected)
• Switchable between watchdog timer mode and interval timer
mode
Serial
interface
Serial
communication
interface (SCI)
• Five channels (asynchronous or clocked synchronous serial
communication mode)
• Full-duplex communication capability
• Choice of any bit rate and choice of LSB-first or MSB-first