Siemens EF 88H Series Manual de usuario descargar pdf (Pagina 103)

Device Specifications

C501

Semiconductor Group 10-6

AC Characteristics for C501-L / C501-1R / C501-1E (cont’d)

External Data Memory Characteristics

External Clock Drive Characteristics

Parameter Symbol Limit Values Unit

12 MHz

Clock

Variable Clock

CLCL

= 3.5 MHz to 12 MHz

min. max. min. max.

pulse width t

RLRH

400 – 6t

CLCL

– 100 – ns

pulse width t

WLWH

400 – 6t

CLCL

– 100 – ns

Address hold after ALE

LLAX2

30 – t

CLCL

– 53 – ns

to valid data in t

RLDV

– 252 – 5t

CLCL

– 165 ns

Data hold after RD

RHDX

0–0–ns

Data float after RD

RHDZ

–97– 2t

CLCL

– 70 ns

ALE to valid data in

LLDV

– 517 – 8t

CLCL

– 150 ns

Address to valid data in

AVDV

– 585 – 9t

CLCL

– 165 ns

ALE to WR

or RD t

LLWL

200 300 3t

CLCL

– 50 3t

CLCL

+ 50 ns

Address valid to WR

or RD t

AVWL

203 – 4t

CLCL

– 130 – ns

or RD high to ALE high t

WHLH

43 123 t

CLCL

– 40 t

CLCL

+ 40 ns

Data valid to WR

transition t

QVWX

33 – t

CLCL

– 50 – ns

Data setup before WR

QVWH

433 – 7t

CLCL

– 150 – ns

Data hold after WR

WHQX

33 – t

CLCL

– 50 – ns

Address float after RD

RLAZ

–0–0ns

Parameter Symbol Limit Values Unit

Variable Clock

Freq. = 3.5 MHz to 12 MHz

min. max.

Oscillator period

CLCL

83.3 285.7 ns

High time

CHCX

20 t

CLCL

– t

CLCX

Low time

CLCX

20 t

CLCL

– t

CHCX

Rise time

CLCH

–20ns

Fall time

CHCL

–20ns

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Siemens EF 88H Series Manual de usuario Pagina 103

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