Registers, E table 67), E figure 41) – Rainbow Electronics AT89C51SND1C User Manual

Page 61: At8xc51snd1c

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61

AT8xC51SND1C

4109E–8051–06/03

Registers

Table 67. WDTRST Register

WDTRST (S:A6h Write only) – Watchdog Timer Reset Register

Reset Value = XXXX XXXXb

Figure 41. WDTPRG Register

WDTPRG (S:A7h) – Watchdog Timer Program Register

Reset Value = XXXX X000b

7

6

5

4

3

2

1

0

-

-

-

-

-

-

-

-

Bit

Number

Bit

Mnemonic

Description

7 - 0

-

Watchdog Control Value

7

6

5

4

3

2

1

0

-

-

-

-

-

WTO2

WTO1

WTO0

Bit

Number

Bit

Mnemonic

Description

7 - 3

-

Reserved
The value read from these bits is indeterminate. Do not set these bits.

2 - 0

WTO2:0

Watchdog Timer Time-Out Selection Bits
Refer to Table 66 for time-out periods.