M16CSLASH62 datasheet(106/621 Pages) RENESAS

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Mitsubishi microcomputers

M16C / 62 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Timer A

Note 1: The settings of the corresponding port register and port direction register are invalid.

Note 2: This bit is valid when only counting an external signal.

Note 3: Set the corresponding port direction register to “0”.

Note 4: This bit is valid for the timer A3 mode register.

For timer A2 and A4 mode registers, this bit can be “0 ”or “1”.

Note 5: When performing two-phase pulse signal processing, make sure the two-phase pulse

signal processing operation select bit (address 038416) is set to “1”. Also, always be

sure to set the event/trigger select bit (addresses 038216 and 038316) to “00”.

Timer Ai mode register

(When not using two-phase pulse signal processing)

Symbol

Address

When reset

TAiMR(i = 2 to 4) 039816 to 039A16

0016

Operation mode select bit

0 1 : Event counter mode

b1 b0

TMOD1

TMOD0

MR0

Pulse output function

select bit

0 : Pulse is not output

(TAiOUT pin is a normal port pin)

1 : Pulse is output (Note 1)

(TAiOUT pin is a pulse output pin)

Count polarity

select bit (Note 2)

MR2

MR1

MR3

0 : (Must always be “0” in event counter mode)

TCK1

TCK0

0 : Counts external signal's falling edges

1 : Counts external signal's rising edges

Up/down switching

cause select bit

0 : Up/down flag's content

1 : TAiOUT pin's input signal (Note 3)

Bit symbol

Bit name

Function

Count operation type

select bit

Two-phase pulse signal

processing operation

select bit (Note 4)(Note 5)

0 : Reload type

1 : Free-run type

0 : Normal processing operation

1 : Multiply-by-4 processing operation

Note 1: This bit is valid for timer A3 mode register.

For timer A2 and A4 mode registers, this bit can be “0” or “1”.

Note 2: When performing two-phase pulse signal processing, make sure the two-phase pulse

signal processing operation select bit (address 038416) is set to “1”. Also, always be

sure to set the event/trigger select bit (addresses 038216 and 038316) to “00”.

Timer Ai mode register

(When using two-phase pulse signal processing)

Symbol

Address

When reset

TAiMR(i = 2 to 4) 039816 to 039A16

0016

Operation mode select bit

0 1 : Event counter mode

b1 b0

TMOD1

TMOD0

MR0

0 (Must always be “0” when using two-phase pulse signal

processing)

0 (Must always be “0” when using two-phase pulse signal

processing)

MR2

MR1

MR3

0 (Must always be “0” when using two-phase pulse signal

processing)

TCK1

TCK0

1 (Must always be “1” when using two-phase pulse signal

processing)

Bit symbol

Bit name

Function

Count operation type

select bit

Two-phase pulse

processing operation

select bit (Note 1)(Note 2)

0 : Reload type

1 : Free-run type

0 : Normal processing operation

1 : Multiply-by-4 processing operation

Figure 1.17.9. Timer Ai mode register in event counter mode

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