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7733 датащи(PDF) 136 Page - Renesas Technology Corp

номер детали 7733
подробное описание детали  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

7733 датащи(HTML) 136 Page - Renesas Technology Corp

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TIMER A
7733 Group User’s Manual
6–25
6.4.2 Operation in event counter mode
Œ 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.
Ž When an underflow or overflow occurs, the reload register’s contents is reloaded, and then counting is
continued.
 The timer Ai interrupt request bit is set to “1” when the underflow or overflow occurs in Ž.
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 6.4.5 shows an operation example in the event counter mode.
6.4 Event counter mode
Fig. 6.4.5 Operation example in event counter mode (without free-run count function, pulse output
function, and two-phase pulse signal processing function)
Timer Ai interrupt
request bit
FFFF16
n
000016
Time
Count start
flag
“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.
Up-down flag “1”
g The above is applied when the up-down flag’s content is selected as the up-down switching factor (i.e., up-down
switching factor selection bit = “0”).
“0”
“0”
“0”
Set to “1” by software



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