AT89C5122 ATMEL [ATMEL Corporation], AT89C5122 Datasheet - Page 178

• Manufacturer Part Number: AT89C5122
• Description: MICROCONTROLLER WITH USB AND SMART CARD READER INTERFACES
• Manufacturer: ATMEL [ATMEL Corporation]

178
AT8xC5122/23
Table 109. Watchdog Timer Out Register - WDTPRG (0A7h)
Reset Value = XXXX X000b
The three lower bits (S0, S1, S2) located into WDTPRG register enables to program the
WDT duration.
Table 110. Machine Cycle Count
To compute WD Timeout, the following formula must be applied:
Note:
Number
7 - 3
Bit
7
2
1
0
-
S2
0
0
0
0
1
1
1
1
Svalue represents the decimal value of (S2 S1 S0)
Mnemonic
Bit
6
S2
S1
S0
-
-
S1
0
0
1
1
0
0
1
1
Time Out = 6 * (2
Description
Reserved
The value read from this bit is indeterminate. Do not change these bits.
WDT Time-out select bit 2
WDT Time-out select bit 1
WDT Time-out select bit 0
5
-
S0
0
1
0
1
0
1
0
1
4
-
14
* 2
Svalue
3
-
- 1 ) / F
Machine Cycle Count
CK_WD
S2
2
2
2
2
2
2
2
2
2
14
15
17
18
19
20
21
16
- 1
- 1
- 1
- 1
- 1
- 1
- 1
- 1
S1
1
4202D–SCR–06/05
S0
0