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PPLICATION NOT

REU05B0046-0100Z June 2003

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M16C/26

Using the M16C/26 Timers in Timer Mode

1.0 Abstract

The following article describes how to use timers A and B as basic timers, referred to as Timer Mode. Timers are

useful for updating multiplexed display, scanning inputs, real time clocks, hardware watchdogs, etc.

2.0 Introduction

The Renesas M30262 is a 16-bit MCU based on the M16C/60 series CPU core. The MCU features include up to

64K bytes of Flash ROM, 2K bytes of RAM, and 4K bytes of Virtual EEPROM. The peripheral set includes 10-bit

A/D, UARTS, Timers, DMA, and GPIO. The MCU has eight timers that consists of five Timer A’s and three Timer

B’s. All eight timers can operate in Timer Mode.

Timer A also has the following additional modes of operation:

• Event Counter Mode

• PWM Mode

• One-Shot Mode

Timer B has the following additional modes of operation:

• Event Counter Mode

• Pulse Width Measurement Mode

Figure 1 and Figure 2 show the block diagrams for timers A and B. Note that there are some differences between

the two timers but both operate similar in Timer Mode. The remainder of this document will focus on setting up

timer A0 in Timer Mode.

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M16C/26 1

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APPLICATION NOTE REU05B0046-0100Z June 2003 Page 1 of 8 M16C/26 Using the M16C/26 Timers in Timer Mode 1.0 Abstract The following article describes

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M16C/26Using the M16C/26 Timers in Timer Mode REU05B0046-0100Z June 2003 Page 2 of 8 Figure 1 Bock Diagram of Timer A Figure 2 Bock Diagram of Ti

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M16C/26Using the M16C/26 Timers in Timer Mode REU05B0046-0100Z June 2003 Page 3 of 8 3.0 Timer Mode Description In Timer Mode, the counter register

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M16C/26Using the M16C/26 Timers in Timer Mode REU05B0046-0100Z June 2003 Page 4 of 8 Figure 4 to Figure 7 show the Timer A related registers for Ti

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M16C/26Using the M16C/26 Timers in Timer Mode REU05B0046-0100Z June 2003 Page 5 of 8 Figure 6 Count start flag register Figure 7 Interrupt contr

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M16C/26Using the M16C/26 Timers in Timer Mode REU05B0046-0100Z June 2003 Page 6 of 8 5.0 Reference Renesas Technology Corporation Semiconductor Home

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M16C/26Using the M16C/26 Timers in Timer Mode REU05B0046-0100Z June 2003 Page 7 of 8 *==============================================================

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M16C/26Using the M16C/26 Timers in Timer Mode REU05B0046-0100Z June 2003 Page 8 of 8 /*************************************************************

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Keep safety first in your circuit designs! • Renesas Technology Corporation puts the maximum effort into making semiconductor products better an

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