Wd overflow mode register – Rainbow Electronics AT75C310 User Manual
Page 118
AT75C310
118
WD Overflow Mode Register
Name:
WD_OMR
Access:
Read/write
Reset Value:
0
•
WDEN: Watchdog Enable
0 = Watchdog is disabled and does not generate any signals.
1 = Watchdog is enabled and generates enabled signals.
•
RSTEN: Reset Enable
0 = Generation of an internal reset by the watchdog is disabled.
1 = When overflow occurs, the watchdog generates an internal reset.
•
IRQEN: Interrupt Enable
0 = Generation of an interrupt by the watchdog is disabled.
1 = When overflow occurs, the watchdog generates an interrupt.
•
EXTEN: External Signal Enable
0 = Generation of a pulse on the pin NWDOVF by the watchdog is disabled.
1 = When an overflow occurs, a pulse on the pin NWDOVF is generated.
•
OKEY: Overflow Access Key
Used only when writing WD_OMR. OKEY is read as 0.
0x234 = Write access in WD_OMR is allowed.
Other value = Write access in WD_OMR is prohibited.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
OKEY
7
6
5
4
3
2
1
0
OKEY
EXTEN
IRQEN
RSTEN
WDEN