EXPLANATION OF MICROCOMPUTER

IC861 (LC24072B)1/2

Pin

Signal

I/O

Function

1

LVcc

PWR

+3.3V

2

HD8

 

 

3

HD7

 

 

4

HD9

 

 

5

HD6

 

 

6

HD10

 

 

7

HD5

I/O

ATAPI data bus

8

HD11

 

 

9

HD4

 

 

10

HD12

 

 

11

HD3

 

 

12

HD13

 

 

13

GND

PWR

0V

14

HD2

 

 

15

HD14

 

ATAPI data bus

16

HD1

I/O

17

HD15

 

 

18

HD0

 

 

19

LVcc

PWR

+3.3V

20

HDREQ

I

ATAPI DMA transmit request

21

/HRD

O

ATAPI Read strobe

22

/HWR

O

ATAPI Write strobe

23

/HIORDY

I

ATAPI Wait

24

/HDACK

O

ATAPI DMA transmit strobe

25

HA1

O

ATAPI Address bus

26

HA0

O

ATAPI Address bus

27

HA2

O

ATAPI Address bus

28

/HCS1

O

ATAPI Control Register chip select

29

/HCS3

O

ATAPI Command Register chip select

30

GND

PWR

0V

31

LVcc

PWR

+3.3V

32

FM-ASIC

I

NC

33

ASIC-FM

O

NC

34

BEACON-ASIC

I

NC

35

ASIC-BEACON

O

NC

36

GYRO-ASIC

I

NC

37

ASIC-GYRO

O

NC

38

-

I

Pull-up

39

-

-

NC

40

IRQ_FM

O

NC

41

IRQ_BEACON

O

NC

42

IRQ_GYRO

O

NC

43

-

-

NC

44

VCK

I

Clock input(7.15909MHz)

45

SC

O

3.579545MHz output

46

PLLCK

O

15.7342kHz output

47

GND

PWR

0V

48

/CS_CARD

O

PC card chip select

49

/LOAD

I

BOOT Soft load

50

SI

O

Serial data output(Voice Gaideance)

51

LRCK

O

L/R clock(Voice Gaideance)

52

SCK

O

Clock output(Voice Gaideance)

53

/WAIT_Q2

I

Q2i Wait input

54

/CS_Q2UGM

O

Q2i UGM chip select

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