Manual

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.
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OKEY
76543210
OKEY EXTEN IRQEN RSTEN WDEN