SM5906AF datasheet(9/30 Pages) NPC

Part #	SM5906AF

Description	Shock-proof Memory Controller for Video CD Players

Download	30 Pages

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Manufacturer	NPC [Nippon Precision Circuits Inc]

Direct Link	http://www.npc.co.jp/en

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NIPPON PRECISION CIRCUITS-9

SM5906AF

Parameter

Symbol

Condition

Rating

Unit

Min

Typ

Max

ZSCK pulsewidth

tSCOW

15 pF load

1/96fs

ZSCK pulse cycle

tSCOY

15 pF load

1/48fs

ZSRDATA, ZLRCK, ZC2PO

tDHL

15 pF load

0

60

ns

output delay time

tDLH

15 pF load

0

60

ns

DRAM access timing (NRAS, NCAS, NWE, A0 to A10, D0 to D3)

Parameter

Symbol

Condition

Rating

Unit

Min

Typ

Max

NRAS pulsewidth

tRASL

15 pF load

4

tCY(note)

tRASH

15 pF load

2

tCY

NRAS falling edge to NCAS falling edge

tRCD

15 pF load

2

tCY

NCAS pulsewidth

tCASH

15 pF load

4

tCY

tCASL

15 pF load

2

tCY

NRAS

Setup time

tRADS

15 pF load

1

tCY

falling edge to address

Hold time

tRADH

15 pF load

1

tCY

NCAS

Setup time

tCADS

15 pF load

1

tCY

falling edge to address

Hold time

tCADH

15 pF load

2

tCY

NCAS

Setup time

tCWDS

15 pF load

3

tCY

falling edge to data write

Hold time

tCWDH

15 pF load

2

tCY

NCAS

Input setup

tCRDS

40

ns

rising edge to data read

Input hold

tCRDH

0ns

NWE pulsewidth

tWEL

15 pF load

5

tCY

NWE falling edge to NCAS falling edge

tWCS

15 pF load

3

tCY

Refresh cycle

4M

CD-DA MODE

3.0

ms

(fs = 44.1 kHz playback)

DRAM

VCD MODE

2.6

ms

tREF

× 1

SVC MODE

1.3

ms

Memory system ON

16M

CD-DA MODE

5.9

ms

Read sequence operation

DRAM

VCD MODE

5.2

ms

(RDEN=H)

× 1

SVC MODE

2.6

ms

Note.

tCY is the system clock (CLK) input (384fs) cycle time. tCY = 59 ns when fs = 44.1 kHz

ZSCK

ZSRDATA

0.5VDD

DLH

ZLRCK

0.5VDD

DHL

ttDLH

SCOW

t

tSCOW

t

SCOY

t

ZC2PO

Serial output (ZSRDATA, ZLRCK, ZSCK ZC2PO pins)

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SM5906AF Datasheet(PDF) 9 Page - Nippon Precision Circuits Inc

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