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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT90SCR100 датащи(PDF) 202 Page - ATMEL Corporation |
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AT90SCR100 датащи(HTML) 202 Page - ATMEL Corporation |
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202 / 433 page  202 TPR0327AY–SMS–30Jan09 AT90SCR100 Figure 16-1. DC/DC initialization procedure: 16.3.2 Changing VCard Level Parameter It is forbidden to modify the voltage delivered by CVcc while DC/DC is loaded. The DCCR.DCBUSY bit permits to check the state of DC/DC load. While it is set, it is advised to not: • Shut the DC/DC Off (using DCCR.DCON bit) • Change SCICR.VCARD[0..1] parameter 16.4 Summary: State Machine The graph below permits to see how work the different signals of the DC/DC, and understand what is accepted, or not, regarding the moment of DC/DC use: This procedure does not take into account any error signal. This should be added for full Smart Card Interface management. DC/DC Activation CVcc generated Need activation sequence Wait for Card Insertion DCCR.DCON=1 Set SCICR.VCARD SCCON.CARDVCC=1 Start the DC/DC Converter No Card Presence required Configure the Voltage to generate No Card Presence required Ask for CVcc generation As the DCDC voltage is now generated, the activation sequence can be processed This can be done either by polling or interruption. See Card Presence Input section Poll DC/DC Converter is ready DCCR.DCRDY=1? No Yes Poll to know when CVcc has reached the desired voltage SCISR.VCARDOK=1 ? No Yes Caution ! |
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