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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST7265X 数据表(PDF) 60 Page - STMicroelectronics |
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ST7265X 数据表(HTML) 60 Page - STMicroelectronics |
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60 / 166 page  ST7265x 60/166 WATCHDOG TIMER (Cont’d) 11.1.8 Register Description CONTROL REGISTER (CR) Read /Write Reset Value: 0111 1111 (7F h) Bit 7 = WDGA Activation bit. This bit is set by software and only cleared by hardware after a reset. When WDGA = 1, the watchdog can generate a reset. 0: Watchdog disabled 1: Watchdog enabled Note: This bit is not used if the hardware watch- dog option is enabled by option byte. Bits 6:0 = T[6:0] 7-bit timer (MSB to LSB). These bits contain the decremented value. A reset is produced when it rolls over from 40h to 3Fh (T6 becomes cleared). Table 18. Watchdog Timer Register Map and Reset Values 70 WDGA T6 T5 T4T3 T2 T1T0 Address (Hex.) Register Label 76 5 4 32 10 14 WDGCR Reset Value WDGA 0 T6 1 T5 1 T4 1 T3 1 T2 1 T1 1 T0 1 1 |
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