ST72321BXXX-AUTO datasheet(30/247 Pages) STMICROELECTRONICS

Part #	ST72321BXXX-AUTO

Description	8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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30 / 247 page

Package pinout and pin description

ST72321Bxxx-Auto

30/247

41

29

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 pin

(Flash devices only)

42

30

PC7/SS/AIN15

I/O CT

X

XX

X

Port C7

SPI Slave

Select

(active low)

ADC

Analog

Input 15

43

-

(1)(2)

PA0

I/O CT

X

ei0

X

Port A0

44

-

(2)(1)

PA1

I/O CT

X

ei0

X

Port A1

45

-

(1)(2)

PA2

I/O CT

X

ei0

X

Port A2

46

31

PA3(HS)

I/O CT HS

X

ei0

X

Port A3

47

32

VDD_1

(3)

S

Digital Main Supply Voltage

48

33

VSS_1

(3)

S

Digital Ground Voltage

49

34

PA4(HS)

I/O CT HS

X

XX

X

Port A4

50

35

PA5(HS)

I/O CT HS

X

XX

X

Port A5

51

36

PA6(HS)/SDAI

I/O CT HS

X

T

Port A6

I2C Data

52

37

PA7(HS)/SCLI

I/O CT HS

X

T

Port A7

I2C Clock

53

38

VPP/ ICCSEL

I

Must be tied low. In Flash

programming mode, this pin acts

as the programming voltage input

VPP. See Section 19.9.2:

ICCSEL/VPP pin for more details.

High voltage must not be applied

to ROM devices.

54

39

RESET

I/O CT

Top priority non-maskable interrupt

55

-

EVD

I

A

External voltage detector

56

-

TLI

I

CT

X

Top level interrupt input pin

57

40

VSS_2

(3)

S

Digital Ground Voltage

58

41

OSC2(5)

I/O

Resonator oscillator inverter output

59

42

OSC1(5)

I

External clock input or Resonator

oscillator inverter input

60

43

VDD_2

(3)

S

Digital Main Supply Voltage

61

44

PE0/TDO

I/O CT

X

Port E0

SCI Transmit Data Out

Table 2.

Device pin description (continued)

Pin No.

Pin name

Level

Port

Main

function

(after

reset)

Alternate function

Input

Output

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