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7733 Fiches technique(PDF) 178 Page - Renesas Technology Corp

No de pièce 7733
Description  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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Fabricant  RENESAS [Renesas Technology Corp]
Site Internet  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 Fiches technique(HTML) 178 Page - Renesas Technology Corp

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TIMER B
7733 Group User’s Manual
7–15
7.3.3 Operation in timer mode
Œ When the count start flag is set to “1,” the counter starts counting of the count source.
 When an underflow occurs, the reload register’s contents is reloaded, and then counting is continued.
Ž 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 7.3.3 shows an operation example in the timer mode.
7.3 Timer mode
Fig. 7.3.3 Operation example in timer mode
Counting is stopped.
Counting is restarted.
FFFF16
n
000016
Time
Count start flag
Timer Bi interrupt
request bit
“1”
“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.
Set to “1” by software
“0”
“0”
1 / fi ! (n + 1)
fi = Frequency of count source
( 2, f16, f64, f512)
Cleared to “0” by software
f



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