Renesas M16C/20 1.5.2 Timer B

M16C/26 Group

Rev.0.90 2003.12.28 page 12 of 28

Under development

Preliminary specification

Specifications in this manual are tentative and subject to change.

1.5.2 Timer B

1.5.2.1 Timer B (Timer Mode)

1. The timer remains idle after reset. Set the mode, count source, counter value, etc. using the TBiMR

(i = 0 to 2) register and TBi register before setting the TBiS bit in the TABSR register to “1” (count

starts).

Always make sure the TBiMR register is modified while the TBiS bit remains “0” (count stops)

regardless whether after reset or not.

2. A value of a counter, while counting, can be read in TBi register at any time. “FFFF16” is read while

reloading. Setting value is read between setting values in TBi register at count stop and starting a

counter.

1.5 Precautions for Timers

Contents

Main M16C/26 Group Keep safety first in your circuit designs! Notes regarding these materials Page Table of contents A-2 2. Differences Made Depending on Manufactured Time...............................25 1. Usage Precaution 1.1 Precautions for Power Control 1.2 Precautions for Protect 1.3 Precautions for Interrupts 1.3.1 Reading address 00000 1.3.2 Setting the SP 1.3.3 The NMI Interrupt 1.3.5 INT Interrupt 1.3.4 Changing the Interrupt Generate Factor 1.3.6 Rewrite the Interrupt Control Register Example 2:Using the dummy read to keep the FSET instruction waiting Example 3:Using the POPC instruction to changing the I flag Page 1.4 Precautions for DMAC 1.4.1 Write to DMAE Bit in DMiCON Register 1.5 Precautions for Timers 1.5.1 Timer A Page Page Page 1.5.2 Timer B Page Page 1.6 Precautions for Serial I/O (Clock-synchronous Serial I/O) 1.6.1 Transmission/reception 1.6.2 Transmission 1.6.3 Reception 1.7 Precautions for Serial I/O (UART Mode) 1.7.1 Special Mode 2 1.7.2 Special Mode 4 (SIM Mode) 1.8 Precautions for A-D Converter Microcomputer Page 1.9 Precautions for Programmable I/O Ports 1.10.2 Precautions for Stop mode 1.10.4 1.10.3 Precautions for Wait mode Precautions for Low power dissipation mode, ring oscillator low power dissipation mode 1.10.5 Writing command and data 1.10.7 Operation speed 1.10.8 Instructions inhibited against use 1.10.9 Interrupts 1.10.10 How to access 1.10.11 Writing in the user ROM area 1.10.12 DMA transfer 1.10.13 Regarding Programming/Erasure Times and Execution Time 1.10.15 1.10.14 Definition of Programming/Erasure Times Flash Memory Version Electrical Characteristics 10,000 E/W cycle products (D7, D9, U7, U9)