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ST25R200 数据表(PDF) 12 Page - STMicroelectronics |
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ST25R200 数据表(HTML) 12 Page - STMicroelectronics |
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12 / 88 page  Figure 6. State diagram Power-down Mode Ready Mode POR en = 1 Wake-up Mode en = 0 Reset Mode RESET=0 RESET=1 RESET =1 RESET=1 MS71320V1 5.2 Power-on sequence Once powered, the device enters the PD mode. The content of all registers is set to its default state. One can set the device into any other operation mode by changing the configuration on the operation register. Transiting the device to RD mode and prepared for communication comprises on: • Applying appropriate configuration on registers: Operation and General • Setting en = 1 and waiting for the device to get ready and with the oscillator stable (I_osc/osc_ok) • The internal voltage regulators must be configured. It is recommended to use direct command adjust regulators to improve the system PSRR Once completed, the device is ready for communication. ST25R200 Application information DS13658 - Rev 2 page 12/88 |
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