Casio PCR-275 User Manual download pdf (Page 12)

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5. CIRCUIT EXPLANATION

5-1. CPU (IC12: uPD784215AGC8038EU)

5-1-1. Pin Assignment

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

75

74

73

72

71

70

69

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66

65

64

63

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61

60

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54

53

52

51

100

76

P120/RTP0

P121/RTP1

P122/RTP2

P123/RTP3

P124/RTP4

P125/RTP5

P126/RTP6

P127/RTP7

V

DD

X2

X1

V

SS

XT2

XT1

RESET

P00/INTP0

P01/INTP1

P02/INTP2/NMI

P03/INTP3

P04/INTP4

P05/INTP5

P06/INTP6

AV

DD

AV

REF0

P10/ANI0

P62/A18

P61/A17

P60/A16

V

SS

P57/A15

P56/A14

P55/A13

P54/A12

P53/A11

P52/A10

P51/A9

P50/A8

P47/AD7

P46/AD6

P45/AD5

P44/AD4

P43/AD3

P42/AD2

P41/AD1

P40/AD0

P87/A7

P86/A6

P85/A5

P84/A4

P83/A3

P95

P94

P93

P92

P91

P90

TEST/V

PP

P37/EXA

P36/TI01

P35/TI00

P34/TI2

P33/TI1

P32/TO2

P31/TO1

P30/TO0

P103/TI8/TO

8

P102/TI7/TO7

P101/TI6/TO6

P100/TI5/TO5

V

DD

P67/ASTB

P66/WAIT

P65/WR

P64/RD

P63/A19

P11/ANI1

P12/ANI2

P13/ANI3

P14/ANI4

P15/ANI5

P16/ANI6

P17/ANI7

AV

SS

P130/ANO0

P131/ANO1

AV

REF1

P70/RxD2/SI2

P71/TxD2/SO2

P72/ASCK2/SCK2

P20/RxD1/SI1

P21/TxD1/SO1

P22/ASCK1/SCK1

P23/PCL

P24/BUZ

P25/SI0/SDA0

P26/SO0

P27/SCK0/SCL0

P80/A0

P81/A1

P82/A2

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