T89C51CC02CA-RATIM datasheet(65/145 Pages) ATMEL

Teilenummer	T89C51CC02CA-RATIM

Bauteilbeschribung	Enhanced 8-bit Microcontroller with CAN Controller and Flash Memory

PDF	145 Pages

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T89C51CC02

4126D–CAN–05/03

Watchdog Programming

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

WDT duration.

Table 44. 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 45. 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 ms

FTime

Out

Svalue

() 1

–

()

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

–

T89C51CC02CA-RATIM Datenblatt(PDF) 65 Page - ATMEL Corporation

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