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MB90800 Datasheet(PDF) 53 Page - Fujitsu Component Limited. |
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MB90800 Datasheet(HTML) 53 Page - Fujitsu Component Limited. |
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53 / 92 page  MB90800 Series DS07-13733-6E 53 12. Watchdog timer The watchdog timer is a timer counter provided for preventing program malfunction. The watchdog timer is a 2- bit counter operating with an output of the timebase timer or watch timer as count clock and resets the CPU when the counter is not cleared within the interval time. (1) Register list (2) Block diagram Watchdog timer control register (WDTC) − : Unused bit Initial Value 0000A8H XXXXX111B Read/Write ⎯ RR R W W W 76 5 4 3 2 1 0 ⎯ R PONR WRST ERST SRST WTE WT1 WT0 PONR WRST ERST SRST WTE WT1 WT0 × 21 × 22 × 28 × 29 × 210 × 211 × 212 × 213 × 214 × 215 × 216 × 217 × 218 × 21 SCLK CLR CLR × 22 × 28 × 29 × 210 × 211 × 212 × 213 × 214 × 215 × 216 × 217 × 218 2 4 4 Watchdog timer control register (WDTC) Watchdog timer Watch mode start Time-base timer mode start Sleep mode start Hold status start Counter clear control circuit Count clock selector 2-bit counter Watchdog reset generation circuit Clear Internal reset generation circuit CLR and start-up Time base counter Dividing HCLK by 2 HCLK: Oscillation clock SCLK: Sub clock WDCS bit of watch timer control register (WTC) SCM bit of clock selection register (CKSCR) Stop mode start |
Similar Part No. - MB90800_09 |
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Similar Description - MB90800_09 |
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