M30620FCAFP datasheet(327/615 Pages) RENESAS

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Timer A

Mitsubishi microcomputers

M16C / 62A Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

2-10

Figure 2.2.4. Timer A-related registers (3)

TA1OS

TA2OS

TA0OS

One-shot start flag

Symbol

Address

When reset

ONSF

038216

00X000002

Timer A0 one-shot start flag

Timer A1 one-shot start flag

Timer A2 one-shot start flag

Timer A3 one-shot start flag

Timer A4 one-shot start flag

TA3OS

TA4OS

Bit name

Function

Bit symbol

Nothing is assigned.

In an attempt to write to this bit, write “0”. The value, if read, turns out to be indeterminate.

TA0TGL

TA0TGH

0 0 : Input on TA0IN is selected (Note)

0 1 : TB2 overflow is selected

1 0 : TA4 overflow is selected

1 1 : TA1 overflow is selected

Timer A0 event/trigger

select bit

b7 b6

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

1 : Timer start

When read, the value is “0”

Timer A4 up/down flag

Timer A3 up/down flag

Timer A2 up/down flag

Timer A1 up/down flag

Timer A0 up/down flag

Timer A2 two-phase pulse

signal processing select bit

Timer A3 two-phase pulse

signal processing select bit

Timer A4 two-phase pulse

signal processing select bit

Symbol

Address

When reset

UDF

038416

0016

TA4P

TA3P

TA2P

Up/down flag (Note 1)

Bit name

Function

Bit symbol

TA4UD

TA3UD

TA2UD

TA1UD

TA0UD

0 : Down count

1 : Up count

This specification becomes valid

when the up/down flag content is

selected for up/down switching

cause

0 : two-phase pulse signal

processing disabled

1 : two-phase pulse signal

processing enabled (Note 2)

When not using the two-phase

pulse signal processing function,

set the select bit to “0”

Note 1: Use MOV instruction to write to this register.

Note 2: Set the TAiIN and TAiOUT pins correspondent port direction registers to “0”.

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