sak-c868p-1rr Infineon Technologies Corporation, sak-c868p-1rr Datasheet - Page 184
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sak-c868p-1rr
Manufacturer Part Number
sak-c868p-1rr
Description
8 - Bit Cmos Microcontroller
Manufacturer
Infineon Technologies Corporation
Datasheet
1.SAK-C868P-1RR.pdf
(266 pages)
- Current page: 184 of 266
- Download datasheet (4Mb)
6.1.4
The time period for an overflow of the Watchdog Timer is programmable in two ways :
The period P
therefore be determined by the following formula:
Table 6-1
a certain module clock. Some numbers are rounded to 3 significant digits.
Table 6-1
Reload value
in WDTREL
FF
7F
00
Note :For safety reasons, the user is advised to rewrite WDTCON each time before the
User’s Manual
– the input frequency to the Watchdog Timer can be selected via bit WDTIN in
– the reload value WDTREL for the high byte of WDT can be programmed in register
H
H
H
register WDTCON to be either f
WDTCON.
Watchdog Timer is serviced.
lists the possible ranges for the watchdog time which can be achieved using
Input Clock Selection
WDT
Watchdog Time Ranges
between servicing the Watchdog Timer and the next overflow can
P
Prescaler for f
2 (WDTIN = ‘0’)
40 MHz
12.8 µs
1.65 ms 3.3 ms
3.28 ms 6.55 ms 8.19 ms 209.7 ms 419.4 ms 524 ms
WDT
=
2
20 MHz
25.6 µs
(1 +WDTIN*6)
SYS
SYS
/2 or f
6-6
32.0 µs
4.13 ms
16 MHz
* (2
SYS
f
/128.
16
SYS
- WDTREL * 2
128 (WDTIN = ‘1’)
40 MHz
819.2 µs 1.64 ms 2.05 ms
105.7 ms 211.3 ms 264 ms
8
)
Fail Save Mechanism
20 MHz
V 1.0, 2003-01
16 MHz
C868
[6.1]
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