ESMMC64 datasheet(5/8 Pages) EOREX

5 / 8 page

64MB/128MB/256MB/512MB MultiMediaCardTM

Eorex Corporation

www.eorex.com

5/8

3. Recommend Operating Conditions

Parameter

Symbol

Min

Typ

Max

Unit

Remark

Supply voltage

VCC

2.7

3.0

3.6

Low-level input current

VIL

VSS-0.3

0.25VCC

Inputs

High-level input current

VIH

0.625VCC

VCC+0.3

High-level output current

IOH

-2

Outputs

Low-level output current

IOL

Clock

Clock frequency data

transfer mode (pp)

fpp

MHz

CL<100pF,(10 cards)

Clock frequency ident.

Mode (od)

fOD

400

KHz

Clock cycle time data

transfer mode (pp)

Tpp =

1/fpp

Clock cycle time ident.

Mode (od)

tOD =

1/fOD

2.5

µs

Clock low time

tWL

CL<100pF,(10 cards)

Clock high time

tWH

CL<100pF,(10 cards)

Clock input rise time

tLH

CL<100pF,(10 cards)

Clock input fall time

tHL

CL<100pF,(10 cards)

Clock low time

tWL

CL<250pF,(30 cards)

Clock high time

tWH

CL<250pF,(30 cards)

Clock input rise time

tLH

CL<250pF,(30 cards)

Input clk

Clock input fall time

tHL

MHz

CL<250pF,(30 cards)

4. Recommend Bus Conditions

Parameter

Symbol

Min

Typ

Max

Unit

Remark

Clock

Pull-up resistance for CMD

RCMD

4.7

100

KΩ

To prevent bus floating

Pull-up resistance for DAT

RDAT

100

KΩ

To prevent bus floating

250

fpp≦5MHz, 30 cards

Bus signal line capacitance

100

fpp≦20MHz, 10 cards

Input clk

Maximum signal line inductance

fpp≦20MHz

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