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ST8034C Datasheet(PDF) 11 Page - STMicroelectronics |
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ST8034C Datasheet(HTML) 11 Page - STMicroelectronics |
11 / 39 page Pin description ST8034T, ST8034AT, ST8034P, ST8034C 12/40 DocID024587 Rev 4 Table 3. Pin description ST8034P and ST8034C Pin number Symbol Ref. supply Function 1VDD(INTF) Microcontroller interface supply voltage (input) 2RSTIN VDD(INTF) Card reset input from microcontroller 3CS VDD(INTF) Chip select input. CS = high => device is active, low => all microcontroller interface pins set to high impedance. (ST8034C) VCC_SEL VDD(INTF) VCC (card supply) selection input: logic high selects VCC = 5 V, logic low selects VCC = 3 V, left-floating selects VCC = 1.8 V. (ST8034P) 4CMDVCC VDD(INTF) Start activation sequence input (from microcontroller, active low) 5PRES VDD(INTF) Card presence input (active low: PRES = low => card is present). Debounced. 6I/O VCC Card input/output data line (C7); with internal 9 k pull-up resistor to VCC 7 GND Ground 8CLK VCC Clock to card (C3) 9RST VCC Card reset, output (C2) 10 VCC Supply voltage for the card, output (C1) 11 VDDP LDO supply voltage input (for VCC generation) 12 VDD Control logic supply voltage input 13 PORADJ VDD(INTF) Power-on reset threshold adjustment input 14 OFF VDD(INTF) Interrupt to microcontroller (active low output, with internal 20 k pull-up resistor to VDD(INTF)) 15 I/OUC VDD(INTF) Microcontroller data I/O line (with internal 10 k pull-up resistor connected to VDD(INTF)) 16 CLKIN VDD(INTF) External clock input |
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