Renesas 16-bit single-chip microcomputer Manual De Usuario

Rev.1.02    Jul 01, 2005    page 96 of 314
REJ09B0126-0102

M16C/6N Group (M16C/6NL, M16C/6NN)

12. Timers

This document is under development and its contents are subject to change.

Symbol

Address

After Reset

TA0MR to TA4MR

0396h to 039Ah

00h

b7

b6

b5

b4

b3

b2

b1

b0

Operation Mode Select Bit

0 1 : Event counter mode 

(1)

b1 b0 

TMOD0

MR0

 

Pulse Output Function
Select Bit

0 : Pulse is not output

(TAiOUT pin functions as I/O port)

1 : Pulse is output

(TAiOUT pin functions as pulse output pin)

Count Polarity Select Bit 

(2)

MR2

MR1

MR3

Set to "0" in event counter mode

TCK0

Count Operation Type 
Select Bit

0 1

0

0 : Counts falling edge of external signal 
1 : Counts rising edge of external signal

Up/Down Switching 
Cause Select Bit

0 : UDF register
1 : Input signal  to TAiOUT pin 

(3)

0 : Reload type
1 : Free-run type

Bit Symbol

Bit Name

Function

RW

TCK1

Can be "0" or "1" when not using two-phase pulse signal processing.

TMOD1

Timer Ai Mode Register (i = 0 to 4)
(When not using two-phase pulse signal processing)

RW

RW

RW

RW

RW

RW

RW

RW

NOTES:

1. During event counter mode, the count source can be selected using the ONSF and TRGSR registers.
2. Effective when the TAiTGH and TAiTGL bits in the ONSF or TRGSR register are "00b" (TAiIN pin input).
3. Count down when input on TAiOUT pin is low or count up when input on that pin is high. The port direction

bit for TAiOUT pin is set to "0" (input mode).