HD404314H 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD404314H

4-bit HMCS400-series microcomputer

Hitachi -> Renesas Electronics 

HD404318 Series

Timer A interrupt

request flag

(IFTA)

System

clock

øPER

Selector

Prescaler S (PSS)

Timer

counter A

(TCA) Overflow

3

Timer mode

register A

(TMA)

Figure 22 Timer A Block Diagram

Timer mode register A (TMA: $008)

Bit

Initial value

Read/Write

Bit name

3

—

—

Not used

2

0

W

TMA2

1

0

W

TMA1

0

0

W

TMA0

Source Input clock

TMA2 TMA1 TMA0 Prescaler frequency

0

0

0 PSS

1 PSS

1

0 PSS

1 PSS

1

0

0 PSS

1 PSS

1

0 PSS

1 PSS

2048tcyc

1024tcyc

512tcyc

128tcyc

32tcyc

8tcyc

4tcyc

2tcyc

Figure 23 Timer Mode Register A (TMA)

32

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