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ST7SCR Datasheet(PDF) 65 Page - STMicroelectronics |
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ST7SCR Datasheet(HTML) 65 Page - STMicroelectronics |
65 / 101 page ST7SCR 65/101 SMARTCARD INTERFACE (Cont’d) SMARTCARD INTERFACE STATUS REGISTER (CRDSR) Read only (Read/Write on some bits) Reset Value: 1000 0000 (80h) Bit 7 =TxBEF Transmit Buffer Empty Flag. - Read only 0: Transmit buffer is not empty 1: Transmit buffer is empty Bit 6 = CRDIRF Card Insertion/Removal Flag. - Read only 0: No card is present 1: A card is present Bit 5 = IOVF Card Overload Current Flag. - Read only 0: No card overload current 1: Card overload current Bit 4 = VCARDOK Card voltage status Flag. - Read only 0: The card voltage is not in the specified range 1: The card voltage is within the specified range Bit 3 = WTF Waiting Time Counter overflow Flag. - Read only 0: The WT Counter has not reached its maximum value 1: The WT Counter has reached its maximum val- ue Bit 2 = TXCF Transmitted character Flag. - Read/Write This bit is set by hardware and cleared by soft- ware. 0: No character transmitted 1: A character has been transmitted Bit 1 = RXCF Received character Flag. - Read only This bit is set by hardware and cleared by hard- ware when the CRDRXB buffer is read. 0: No character received 1: A character has been received Bit 0 = PARF Parity Error Flag. - Read/Write This bit is set by hardware and cleared by soft- ware. 0: No parity error 1: Parity error Note: When a character is received, the RXCF bit is always set.When a character is received with a parity error, the PARF bit is also set. 70 TXBE F CRD IRF IOVF VCARD OK WTF TXC F RXC F PAR F |
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Similar Description - ST7SCR_07 |
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