BU24591 datasheet(3/8 Pages) ROHM

Numer części	BU24591

Szczegółowy opis	4bit 1chip micro-controller for CD-DA

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Producent	ROHM [Rohm]

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3 / 8 page

BU24591

Optical ICs

3/7

!

Pin assignment

32

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

49

64

50

51

52

53

54

55

56

57

58

59

60

61

62

63

BU24591

OSC1

OSC2

VDD

ADC0

ADC1

ADC2

ADC3

ADC4

ADC5

ADC6

ADC7

TEST

COM0

COM1

COM2

COM3

PWC

P13

P12

P11

P10

P03

P02

P01

P00

SCK0

SIO0

SIN0

SEG19

SEG18

SEG17

SEG16

!

Pin descriptions

Pin No.

I / O

Function

Type

P00 to P03

P10 to P13

P20 to P23

(PI011A block

)

24 to 27

28 to 31

35 to 38

I / O

• 4-bit input or output.

• Pull-up resistor can be turned ON/OFF in a bit by program.

• Input/Output is specified in a bit by program.

(Output is Nch open drain type.)

D

W0 to W3

(STP04A block

)

43 to 46

I

• General 4-bit input.

• It can be used as stop cancellation input and interrupt request

signal input by program. (It can be specified in a bit)

• Pull-up resistor can be turned ON/OFF in a bit by program.

• Upon resetting, the pull-up resistor is turned OFF.

C

BIN

(BIX03A block

)

42

I

• General 1-bit input.

• It can be used as stop cancellation input and interrupt request

signal input by program.

• Pull-up resistor can be turned ON/OFF by program.

• Upon resetting, the pull-up resistor is turned OFF.

C

∗1 Immediately after resetting, terminal is in high impedance state. Therefore, termination may be required in some applications.

• Upon resetting, input is specified, and the pull-up resistance

is turned OFF.

∗1

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