Siemens EF 88H Series Manual de usuario descargar pdf (Pagina 105)

Device Specifications

C501

Semiconductor Group 10-8

AC Characteristics for C501-L24 / C501-1R24 / C501-1E24 (cont’d)

External Data Memory Characteristics

External Clock Drive Characteristics

Parameter Symbol Limit Values Unit

24 MHz

Clock

Variable Clock

CLCL

= 3.5 MHz to 24 MHz

min. max. min. max.

pulse width t

RLRH

180 – 6t

CLCL

– 70 – ns

pulse width t

WLWH

180 – 6t

CLCL

– 70 – ns

Address hold after ALE

LLAX2

15 – t

CLCL

– 27 – ns

to valid data in t

RLDV

– 118 – 5t

CLCL

– 90 ns

Data hold after RD

RHDX

0–0–ns

Data float after RD

RHDZ

–63– 2t

CLCL

– 20 ns

ALE to valid data in

LLDV

– 200 – 8t

CLCL

– 133 ns

Address to valid data in

AVDV

– 220 – 9t

CLCL

– 155 ns

ALE to WR

or RD t

LLWL

75 175 3t

CLCL

– 50 3t

CLCL

+ 50 ns

Address valid to WR

or RD t

AVWL

67 – 4t

CLCL

– 97 – ns

or RD high to ALE high t

WHLH

17 67 t

CLCL

– 25 t

CLCL

+ 25 ns

Data valid to WR

transition t

QVWX

5–t

CLCL

– 37 – ns

Data setup before WR

QVWH

170 – 7t

CLCL

– 122 – ns

Data hold after WR

WHQX

15 – t

CLCL

– 27 – ns

Address float after RD

RLAZ

–0–0ns

Parameter Symbol Limit Values Unit

Variable Clock

Freq. = 3.5 MHz to 24 MHz

min. max.

Oscillator period

CLCL

41.7 285.7 ns

High time

CHCX

12 t

CLCL

– t

CLCX

Low time

CLCX

12 t

CLCL

– t

CHCX

Rise time

CLCH

–12ns

Fall time

CHCL

–12ns

1 2 ... 100 101 102 103 104 105 106 107 108 109 110 ... 120 121

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Siemens EF 88H Series Manual de usuario Pagina 105

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