NIPPON PRECISION CIRCUITS-3

SM5904BF

Pin number

Pin name

I/O

Function

Setting

HL

1

VDD2

-

VDD supply pin

2

UC1

Ip/O

Microcontroller interface extension I/O 1

3

UC2

Ip/O

Microcontroller interface extension I/O 2

4

UC3

Ip/O

Microcontroller interface extension I/O 3

5

UC4

Ip/O

Microcontroller interface extension I/O 4

6

VSS2

-

Ground

7

DIT

O

Digital audio interface

8

NTEST1

Ip

Test pin

Test

9

CLK

I

16.9344 MHz clock input

10

VSS1

-

Ground

11

YSRDATA

I

Audio serial input data

12

YLRCK

I

Audio serial input LR clock

Left channel

Right channel

13

YSCK

I

Audio serial input bit clock

14

ZSCK

O

Audio serial output bit clock

15

ZLRCK

O

Audio serial output LR clock

Left channel

Right channel

16

ZSRDATA

O

Audio serial output data

17

YFLAG

I

Signal processor IC RAM overflow flag

Overflow

18

YFCLK

I

Crystal-controlled frame clock

19

YBLKCK

I

Subcode block clock signal

20

NRESET

I

System reset pin

Reset

21

ZSENSE

O

Microcontroller interface status output

22

VDD1

-

VDD supply pin

23

YDMUTE

I

Forced mute pin

Mute

24

YMLD

I

Microcontroller interface latch clock

25

YMDATA

I

Microcontroller interface serial data

26

YMCLK

I

Microcontroller interface shift clock

27

NTEST2

Ip

Test pin

Test

28

NCAS2

O

DRAM2 CAS control(Use External DRAM)

29

D2

Ip/O

DRAM data input/output 2

30

D3

Ip/O

DRAM data input/output 3

31

D0

Ip/O

DRAM data input/output 0

32

D1

Ip/O

DRAM data input/output 1

33

NWE

O

DRAM WE control

34

NRAS

O

DRAM RAS control

35

A9

O

DRAM address 9

36

A8

O

DRAM address 8

37

A7

O

DRAM address 7

38

A6

O

DRAM address 6

39

A5

O

DRAM address 5

40

A4

O

DRAM address 4

41

A0

O

DRAM address 0

42

A1

O

DRAM address 1

43

A2

O

DRAM address 2

44

A3

O

DRAM address 3

Ip : Input pin with pull-up resistor

Ip/O : Input/Output pin (With pull-up resistor when in input mode)

28, 33 to 44 pins for high-impedance output and 29 to 32 pins for input pull-up condition except for using external DRAM.

Pin description