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C167CS Datasheet(PDF) 305 Page - Infineon Technologies AG

Part # C167CS
Description  16-Bit Single-Chip Microcontroller
PDF  517 Pages
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

C167CS Datasheet(HTML) 305 Page - Infineon Technologies AG

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C167CS
Derivatives
The Watchdog Timer (WDT)
User’s Manual
13-5
V2.0, 2000-07
Table 13-1 marks the possible ranges (depending on the prescaler bits WDTPRE and
WDTIN) for the watchdog time which can be achieved using a certain CPU clock.
Note: For safety reasons, the user is advised to rewrite WDTCON each time before the
watchdog timer is serviced.
Table 13-1
Watchdog Time Ranges
CPU clock
fCPU
Prescaler
Reload value in WDTREL
fWDT
FFH
7FH
00H
12 MHz
00
fCPU / 2
42.67
µs 5.50
ms
10.92
ms
01
fCPU / 4
85.33
µs 11.01
ms
21.85
ms
10
fCPU / 128
2.73
ms
352.3
ms
699.1
ms
11
fCPU / 256
5.46
ms
704.5
ms
1398
ms
16 MHz
00
fCPU / 2
32.00
µs4.13
ms8.19
ms
01
fCPU / 4
64.00
µs 8.26
ms
16.38
ms
10
fCPU / 128
2.05
ms
264.2
ms
524.3
ms
11
fCPU / 256
4.10
ms
528.4
ms
1049
ms
20 MHz
00
fCPU / 2
25.60
µs3.30
ms6.55
ms
01
fCPU / 4
51.20
µs 6.61
ms
13.11
ms
10
fCPU / 128
1.64
ms
211.4
ms
419.4
ms
11
fCPU / 256
3.28
ms
422.7
ms
838.9
ms
25 MHz
00
fCPU / 2
20.48
µs2.64
ms5.24
ms
01
fCPU / 4
40.96
µs 5.28
ms
10.49
ms
10
fCPU / 128
1.31
ms
169.1
ms
335.5
ms
11
fCPU / 256
2.62
ms
338.2
ms
671.1
ms
33 MHz
00
fCPU / 2
15.52
µs2.00
ms3.97
ms
01
fCPU / 4
31.03
µs4.00
ms7.94
ms
10
fCPU / 128
0.99
ms
128.1
ms
254.2
ms
11
fCPU / 256
1.99
ms
256.2
ms
508.4
ms



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