Siemens EF 88H Series Bedienungsanleitung PDF herunterladen (Seite 107)

Device Specifications

C501

Semiconductor Group 10-10

AC Characteristics for C501-L40 / C501-1R40 (cont’d)

External Data Memory Characteristics

External Clock Drive Characteristics

Parameter Symbol Limit Values Unit

40 MHz

Clock

Variable Clock

CLCL

= 3.5 MHz to 40 MHz

min. max. min. max.

pulse width t

RLRH

120 – 6 t

CLCL

– 30 – ns

pulse width t

WLWH

120 – 6 t

CLCL

– 30 – ns

Address hold after ALE

LLAX2

10 – t

CLCL

– 15 – ns

to valid data in t

RLDV

–75– 5 t

CLCL

– 50 ns

Data hold after RD

RHDX

0–0–ns

Data float after RD

RHDZ

–38– 2 t

CLCL

– 12 ns

ALE to valid data in

LLDV

– 150 – 8 t

CLCL

– 50 ns

Address to valid data in

AVDV

– 150 – 9 t

CLCL

– 75 ns

ALE to WR

or RD t

LLWL

60 90 3 t

CLCL

– 15 3 t

CLCL

+ 15 ns

Address valid to WR

or RD t

AVWL

70 – 4 t

CLCL

– 30 – ns

or RD high to ALE high t

WHLH

10 40 t

CLCL

– 15 t

CLCL

+ 15 ns

Data valid to WR

transition t

QVWX

5–t

CLCL

– 20 – ns

Data setup before WR

QVWH

125 – 7 t

CLCL

– 50 – ns

Data hold after WR

WHQX

5–t

CLCL

– 20 – ns

Address float after RD

RLAZ

–0–0ns

Parameter Symbol Limit Values Unit

Variable Clock

Freq. = 3.5 MHz to 40 MHz

min. max.

Oscillator period

CLCL

25 285.7 ns

High time

CHCX

10 t

CLCL

– t

CLCX

Low time

CLCX

10 t

CLCL

– t

CHCX

Rise time

CLCH

–10ns

Fall time

CHCL

–10ns

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 120 121

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