ST72F521R6TA datasheet(12/215 Pages) STMICROELECTRONICS

Part #	ST72F521R6TA

Description	80/64-PIN 8-BIT MCU WITH 32 TO 60K FLASH/ROM, ADC, FIVE TIMERS, SPI, SCI, I2C, CAN INTERFACE

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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12 / 215 page

ST72F521, ST72521B

12/215

Notes:

1. In the interrupt input column, “eiX” defines the associated external interrupt vector. If the weak pull-up

52

-

PH3

I/O TT

X

XX

X

Port H3

53

41

PC6/SCK/ICCCLK

I/O CT

X

XX

X

Port C6

SPI Serial

Clock

ICC Clock

Output

Caution: Negative current

injection not allowed on this

5)

54

42

PC7/SS/AIN15

I/O CT

X

XX

X

Port C7

SPI Slave

Select (active

low)

ADC Analog

Input 15

55

43

PA0

I/O CT

X

ei0

X

Port A0

56

44

PA1

I/O CT

X

ei0

X

Port A1

57

45

PA2

I/O CT

X

ei0

X

Port A2

58

46

PA3 (HS)

I/O CT HS

X

ei0

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

XX

X

Port A4

62

50

PA5 (HS)

I/O CT HS

X

XX

X

Port A5

63

51

PA6 (HS)/SDAI

I/O CT HS

X

TPort A6

I2C Data 1)

64

52

PA7 (HS)/SCLI

I/O CT HS

X

TPort 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. See Section 12.9.2

for more details. 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

Top level interrupt input pin

69

-

PH4

I/O TT

X

XX

X

Port H4

70

-

PH5

I/O TT

X

XX

X

Port H5

71

-

PH6

I/O TT

X

XX

X

Port H6

72

-

PH7

I/O TT

X

XX

X

Port H7

73

57

VSS_2

S

Digital Ground Voltage

74

58

OSC23)

I/O

Resonator oscillator inverter output

75

59

OSC13)

I

External clock input or Resonator oscil-

lator inverter input

76

60

VDD_2

S

Digital Main Supply Voltage

77

61

PE0/TDO

I/O CT

X

Port E0

SCI Transmit Data Out

78

62

PE1/RDI

I/O CT

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

Port E3

CAN Receive Data Input

Pin n°

Pin Name

Level

Port

Main

function

(after

reset)

Alternate function

Input

Output

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