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7906 bảng dữ liệu(PDF) 119 Page - Renesas Technology Corp

tên linh kiện 7906
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  531 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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7906 bảng dữ liệu(HTML) 119 Page - Renesas Technology Corp

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TIMER A
7906 Group User’s Manual Rev.2.0
7-16
(2)
Pulse output function
The pulse output function is selected by setting the pulse output function select bit (bit 2 at addresses
5616 to 5816, 5A16, DA16) to “1.” When this function is selected, the TAjOUT pin is forcibly set for the
pulse output pin regardless of the corresponding bits of the port P2 and port P6 direction registers.
The TAjOUT pin outputs a pulse of which polarity is inverted each time a counter underflow occurs.
When the count start bit (addresses 4016, 4116) is “0” (count stopped), the TAjOUT pin outputs “L” level.
Figure 7.3.5 shows an example of operation with the pulse output function selected.
7.3 Timer mode
Fig. 7.3.5 Example of operation with pulse output function selected
FFFF16
n
000016
Time
Count start bit
Timer Aj interrupt
request bit
Cleared to “0” when interrupt request is accepted or cleared by software.
Set to “1” by software.
Starts counting.
Pulse output from
TAjOUT pin
Set to “1” by software.
Cleared to “0” by software.
Starts counting.
Restarts
counting.
n : Reload register’s contents



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