T89C51CC02CA-RATIM datasheet(68/154 Pages) ATMEL

部品番号	T89C51CC02CA-RATIM

部品情報	Enhanced 8-bit Microcontroller with CAN Controller and Flash

PDF	154 Pages

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メーカー	ATMEL [ATMEL Corporation]

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T89C51CC02

4126H–CAN–01/05

Watchdog Programming

The three lower bits (S0, S1, S2) located into WDTPRG register permit to program the

WDT duration.

Table 49. Machine Cycle Count

To compute WD Timeout, the following formula is applied:

Note:

Svalue represents the decimal value of (S2 S1 S0)

Find Hereafter computed Timeout values for f

OSCXTAL = 12 MHz in X1 mode

Table 50. Timeout Computation

Machine Cycle Count

14 - 1

215 - 1

16 - 1

17 - 1

218 - 1

19 - 1

20 - 1

221 - 1

OSC=12 MHz

OSC=16MHz

OSC=20 MHz

16.38 ms

12.28 ms

9.82 ms

32.77 ms

24.57 ms

19.66 ms

65.54 ms

49.14 ms

39.32 ms

131.07 ms

98.28 ms

78.64 ms

262.14 ms

196.56 ms

157.28 ms

524.29 ms

393.12 ms

314.56 ms

1.05 s

786.24 ms

629.12 ms

2.10 s

1.57 s

1.25 s

FTime

Out

Svalue

() 1

–

()

-----------------------------------------------------------------

–

T89C51CC02CA-RATIM データシート(PDF) 68 Page - ATMEL Corporation

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