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SM5906AF

NIPPON PRECISION CIRCUITS INC.

Shock-proof Memory Controller for Video CD Players

Overview

The SM5906AF is a shock-proof memory controller

LSI for video CD players. The operating mode can

be set to CD-DA mode, V-CD mode, or Super V-CD

mode, and external memory can be selected from 2

options (4M, 16M). It operates from a 2.7 to 3.6 V

supply voltage range.

Features

鈥?2-channel processing

鈥?Serial data input

鈥?/div>

2s complement, 16-bit/MSB first

鈥?/div>

Right-justified format

鈥?/div>

Wide capture function

(up to 4

脳

speed input rate)

鈥?/div>

Selectable 16/24/32-bit clock

鈥?System clock input

鈥?/div>

384fs (16.9344 MHz)

鈥?Shock-proof memory controller

鈥?/div>

Selectable CD-DA/V-CD/SVC mode

鈥?/div>

2 external DRAM configurations selectable

1

脳

16M DRAM (4M

脳

4 bits, refresh cycle =

2048 cycle)

1

脳

4M DRAM (1M

脳

4 bits)

鈥?Microcontroller interface

鈥?/div>

Serial command write and status read-out

鈥?/div>

Data residual detector:

11-bit operation, 16-bit output

(Bits 13 to 15 bit are fixed LOW.)

鈥?/div>

Forced mute

鈥?Extension I/O

Microcontroller interface for external control

using 3 extension I/O pins

鈥?+2.7 to +3.6 V operating voltage range

鈥?Schmitt inputs

All input pins (including I/O pins) except CLK

(system clock)

鈥?Reset signal noise elimination

Approximately 3.8

碌s

or longer (65 system

clock pulses) continuous LOW-level reset

- 48-pin QFP package (0.5 mm pin pitch)

Pinout

(Top View)

YMCLK

27

YMDATA

26

NCAS

36

35

34

33

32

31

30

29

28

NRAS

NWE

VSS3

A10

D1

D0

D3

D2

Ordering Information

SM5906AF

48pin QFP

VDD4

A9

A8

A7

A6

A5

A4

A0

A1

A2

A3

VSS4

25

VDD3

24

23

22

21

37

38

39

40

41

42

43

44

45

46

47

48

10

11

12

1

2

3

4

5

6

7

8

9

VSS2

YMLD

YDMUTE

ZSENSE

NRESET

YBLKCK

YFLAG

ZC2PO

ZSRDATA

ZSCK

ZLRCK

VDD2

SM5906AF

JAPAN

20

19

18

17

16

15

14

13

YSRDATA

VDD1

YLRCK

NTEST1

TEST2

NIPPON PRECISION CIRCUITS-1

YC2PO

YSCK

VSS1

UC1

UC2

UC3

CLK

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SM5906AF Datasheet

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