Datasheet

ManualsBrandsNXP SEMICONDUCTORS ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller QFP 80 (14x14) 16-Bit 8 MHz I/O number 63

M68HC12B Family Data Sheet, Rev. 9.1

Freescale Semiconductor 37

Pinout and Signal Descriptions

Figure 1-8. Basic Single-Chip Mode Schematic

10

47

78

31

59

11

48

77

30

49

50

69

33

34

32

17

38

37

36

35

29

28

27

26

V

DD0

V

DD1

V

DDX0

V

DDX1

V

DDAD

V

SS0

V

SS1

V

SSX0

V

SSX1

18

19

20

21

22

23

24

25

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

39

40

41

42

43

44

45

46

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7

61

62

63

64

65

66

67

68

PS0

PS1

PS2

PS3

PS4

PS5

PS6

PS7

51

52

53

54

55

56

57

58

PAD0

PAD1

PAD2

PAD3

PAD4

PAD5

PAD6

PAD7

7

8

9

12

13

14

15

16

PT0

PT1

PT2

PT3

PT4

PT5

PT6

PT7

6

5

4

3

2

1

80

79

76

75

74

73

72

71

PP0

PP1

PP2

PP3

PP4

PP5

PP6

PP7

V

RH

V

RL

V

FP

EXTAL

XTAL

RESET

BKGD

PE0

PE1

PE2/R/W

PE3/LSTRB

PE4/ECLOCK

PE5/MODA

PE6/MODB

PE7/DBE

PDLC0

PDLC1

PDLC2

PDLC3

PDLC4

PDLC5

V

DD0

V

DD1

V

DDX1

V

DDX0

V

DDAD

C2 C1

Y1

JP1

1

2

3

4

5

6

GND

V

DD

1

2

3

4

5

6

MC68HC912B32

HEADER 6

U1

RESET

MODA

MODB

R29

R31

R34

R36

R38

R40

R42

R44

R46

R48

R50

R52

R54

R56

R57

R58

V

DDEX0

4

3

MODA

MODB

SW DIP-2

1

2

S1

V

DD

V

DD

R2

4.7 K

R3

4.7 K

R14

R32

4.7 K

V

DD1

C6

1.0

µ

F

C5

1.0

µ

F

C4

1.0

µ

F

V

DDEX0

V

DDAD

C3

1.0

µ

F

V

DD0

GROUND

V

FP

DN

IN

RSET

21

3

U2

MC34064

RESET

V

FP

70

PDLC6

V

DD

NOTE: This figure provides a suggested schematic only.