Datasheet

Section 11 16-Bit Timer Pulse Unit (TPU)

R01UH0309EJ0500 Rev. 5.00 Page 693 of 1408

Sep 24, 2012

H8S/2456, H8S/2456R, H8S/2454 Group

Section 11 16-Bit Timer Pulse Unit (TPU)

This LSI has two on-chip 16-bit timer pulse units (TPU: unit 0 and unit 1) which each comprises

six 16-bit timer channels, resulting in a total of 12 channels. The functions of unit 0 are listed in

table 11.1, and the functions of unit 1 are listed in table 11.2. The block diagram of unit 0 is shown

in figure 11.1 and the block diagram of unit 1 is shown in figure 11.2.

The descriptions in this section refer to unit 0.

11.1 Features

• Maximum 32-pulse input/output (unit 0: 16, unit 1: 16, when the EXPE bit is 0 in single-chip

mode)

• Selection of 8 counter input clocks for each channel

• The following operations can be set for each channel:

⎯ Waveform output at compare match

⎯ Input capture function

⎯ Counter clear operation

⎯ Synchronous operations:

Multiple timer counters (TCNT) can be written to simultaneously

Simultaneous clearing by compare match and input capture possible

⎯ Maximum of 15-phase PWM output possible by combination with synchronous operation

• Buffer operation settable for channels 0 (6) and 3 (9)

• Phase counting mode settable independently for each of channels 1 (7), 2 (8), 4 (10), and 5

(11)

• Cascaded operation

• Fast access via internal 16-bit bus

• 26 interrupt sources (per unit)

• Automatic transfer of register data

• Programmable pulse generator (PPG) output trigger can be generated (only by unit 0)

• A/D converter conversion start trigger can be generated.

• Module stop state can be set.

• Activation of the DMAC (only by unit 0) and DTC