7733 datasheet(184/940 Pages) RENESAS

tên linh kiện	7733

Giải thích chi tiết về linh kiện	16-BIT SINGLE-CHIP MICROCOMPUTER

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TIMER B

7733 Group User’s Manual

7–21

7.4 Event counter mode

7.4.2 Operation in event counter mode

When the count start flag is set to “1,” the counter starts counting of the count source.

The counter counts the count source’s valid edges.

When an underflow occurs, the reload register’s contents is reloaded, and then counting is continued.

The timer Bi interrupt request bit is set to “1” when the underflow occurs in .

After this, the interrupt request bit remains set to “1” until the interrupt request is accepted or the

interrupt request bit is cleared to “0” by software.

Figure 7.4.3 shows an operation example in the event counter mode.

Fig. 7.4.3 Operation example in event counter mode

Counting is stopped.

Counting is restarted.

FFFF16

000016

Time

Count start flag

Timer Bi interrupt

request bit

“1”

n = Reload register’s contents

Cleared to “0” when an interrupt request is accepted; otherwise, cleared by software

Set to “1” by software

Counting is started.

“0”

Set to “1” by software

Cleared to “0” by software

7733 bảng dữ liệu(PDF) 184 Page - Renesas Technology Corp