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ST72521AR Datasheet(PDF) 7 Page - STMicroelectronics |
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ST72521AR Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 11 page ST72521M/R/AR 7/11 Notes: 1. In the interrupt input column, “eiX” defines the associated external interrupt vector. If the weak pull-up column (wpu) is merged with the interrupt column (int), then the I/O configuration is pull-up interrupt input, else the configuration is floating interrupt input. 2. In the open drain output column, “T” defines a true open drain I/O (P-Buffer and protection diode to VDD 54 42 PC7/SS/AIN15 I/O CT X X X X Port C7 SPI Slave Select (active low) ADC Analog Input 15 55 43 PA0 I/O CT X ei0 X X Port A0 56 44 PA1 I/O CT X ei0 X X Port A1 57 45 PA2 I/O CT X ei0 X X Port A2 58 46 PA3 (HS) I/O CT HS X ei0 X X Port A3 59 47 VDD_1 S Digital Main Supply Voltage 60 48 VSS_1 S Digital Ground Voltage 61 49 PA4 (HS) I/O CT HS X X X X Port A4 62 50 PA5 (HS) I/O CT HS X X X X Port A5 63 51 PA6 (HS)/SDAI I/O CT HS X T Port A6 I2C Data 1) 64 52 PA7 (HS)/SCLI I/O CT HS X T Port A7 I2C Clock 1) 65 53 VPP/ ICCSEL I Must be tied low. In flash programming mode, this pin acts as the programming voltage input VPP. High voltage must not be applied to ROM devices 66 54 RESET I/O CT Top priority non maskable interrupt. 67 55 EVD External voltage detector 68 56 TLI I CT X X Top level interrupt input pin 69 - PH4 I/O TT X X X X Port H4 70 - PH5 I/O TT X X X X Port H5 71 - PH6 I/O TT X X X X Port H6 72 - PH7 I/O TT X X X X Port H7 73 57 VSS_2 S Digital Ground Voltage 74 58 OSC23) I/O Resonator oscillator inverter output or capacitor input for RC oscillator 75 59 OSC13) I External clock input or Resonator oscil- lator inverter input or resistor input for RC oscillator 76 60 VDD_2 S Digital Main Supply Voltage 77 61 PE0/TDO I/O CT X X X X Port E0 SCI Transmit Data Out 78 62 PE1/RDI I/O CT X X X X Port E1 SCI Receive Data In 79 63 PE2/CANTX I/O CT X Port E2 CAN Transmit Data Output 80 64 PE3/CANRX I/O CT X X X X Port E3 CAN Receive Data Input Pin n ° Pin Name Level Port Main function (after reset) Alternate function Input Outpu t |
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