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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN2284 датащи(PDF) 29 Page - STMicroelectronics |
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AN2284 датащи(HTML) 29 Page - STMicroelectronics |
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29 / 40 page  AN2284 8 SC Reader Lib: Description 29/40 - SC_RESET_LOW - SC_RESET_HIGH - SC_ACTIVE - SC_ACTIVE_ON_T0 ● SC_POWER_OFF No power is provided to the smart card (Vcc=0); the STR7 smart card peripheral is disabled. No clock is provided to smart card. ● SC_POWER_ON The smart card peripheral is enabled and initialized; no power is provided to the smart card; no clock is provided to the smart card. ● SC_RESET_LOW and SC_RESET_HIGH In SC_RESET_LOW RST, the pin on the smart card (pin 2) is hold to zero (RST=0). Vcc=5V is provided to the smart card; clock CLK is provided to the smart card. Answer to reset (ATR) procedure begins. The reader waits for an ATR frame from the smart card. If no answer is received, the reader forces reset pin RST high (RST=1) and waits again for an answer to reset in the SC_RESET_HIGH state. ● SC_ACTIVE If an answer to reset is received, the reader goes in active state and decodes the ATR frame. It returns information about the used protocol. ● SC_ACTIVE_ON_T0 If the used protocol is T0, the reader goes in SC_ACTIVE_ON_T0 state and allows to send commands to the smart card. |
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