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71M6521BE Datasheet(PDF) 28 Page - Teridian Semiconductor Corporation |
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71M6521BE Datasheet(HTML) 28 Page - Teridian Semiconductor Corporation |
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28 / 97 page  71M6521BE Energy Meter IC DATA SHEET JANUARY 2008 Page: 28 of 97 © 2005-2008 TERIDIAN Semiconductor Corporation V1.0 Special Function Registers for the WD Timer Interrupt Enable 0 Register (IEN0): MSB LSB EAL WDT ET2 ES0 ET1 EX1 ET0 EX0 Table 26: The IEN0 Register (see also Table 32) Bit Symbol Function IEN0.6 WDT Watchdog timer refresh flag. Set to initiate a refresh of the watchdog timer. Must be set directly before SWDT is set to prevent an unintentional refresh of the watchdog timer. WDT is reset by hardware 12 clock cycles after it has been set. Table 27: The IEN0 Bit Functions (see also Table 32) Note: The remaining bits in the IEN0 register are not used for watchdog control Interrupt Enable 1 Register (IEN1): MSB LSB EXEN2 SWDT EX6 EX5 EX4 EX3 EX2 Table 28: The IEN1 Register (see also Tables 30/31) Bit Symbol Function IEN1.6 SWDT Watchdog timer start/refresh flag. Set to activate/refresh the watchdog timer. When directly set after setting WDT, a watchdog timer refresh is performed. Bit SWDT is reset by the hardware 12 clock cycles after it has been set. Table 29: The IEN1 Bit Functions (see also Tables 31/32) Note: The remaining bits in the IEN1 register are not used for watchdog control |
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