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7733 bảng dữ liệu(PDF) 304 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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WATCHDOG TIMER
7733 Group User’s Manual
10-7
Table 10.2.2 Watchdog timer’s operation and bit state related to oscillation circuit control
Bit state related to oscillation circuit control
10.2 Operation description
Port-Xc selection bit
(Bit 4 at address 6C16)
0
1
System clock
selection bit
(Bit 3 at address 6C16)
0
1
0
1
Main clock external
input selection bit
(Bit 1 at address 6F16)
0
1
0
1
0
1
0
1
Sub clock external
input selection bit
(Bit 2 at address 6F16)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Watchdog
timer’s operation
b
a
b
a
b
a
b
a
b
a
Note: For each bit’s function, refer to Figures 10.2.1 and 10.2.2. For the procedure of writing to the main
clock external input selection bit and the sub clock external input selection bit, refer to Figure 10.2.3.
10.2.3 Operation in wait mode
When the system clock stop bit at wait state (bit 5 at address 6C16 ; Refer to Figure 10.2.1.) = “1,” the
watchdog timer stops operating in the wait mode. Furthermore, after the wait mode is terminated, the
watchdog timer restarts counting from the same state as that before the watchdog timer stops.
When the system clock stop bit at wait state = “0,” the watchdog timer does not stop.



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