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7733 bảng dữ liệu(PDF) 378 Page - Renesas Technology Corp

tên linh kiện 7733
Giải thích chi tiết về linh kiện  16-BIT SINGLE-CHIP MICROCOMPUTER
PDF  940 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
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7733 bảng dữ liệu(HTML) 378 Page - Renesas Technology Corp

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CLOCK GENERATING CIRCUIT
7733 Group User’s Manual
14–15
14.3 Clock control
14.3.4 Clock prescaler reset
The clock prescaler, which divides a sub clock by 32, is reset by writing “1” to the clock prescaler reset
bit (bit 7 at address 6F16). By this function, the count source (fC32) error immediately after the clock timer
starts counting can be held down. Figure 14.3.10 shows the operation timing of the clock prescaler and
timer B2.
Figure 14.3.10 Operation timing of clock prescaler and timer B2
Clock prescaler reset bit
write pulse
XCIN
Clock timer clock source
fC32
Timer B2 count value
Timer B2 count start flag
XCIN divided by 31
(Note)
n (Set value)
n—1
The above is applied when the main clock is selected as the system clock, in other words, when the system clock selection
bit
(CM3) = “0.”
Note: Only in this period, XCIN divided by 31 is selected.
After this period, XCIN divided by 32 is selected.
XCIN divided by 32



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