Siemens EF 88H Series Bedienungsanleitung PDF herunterladen (Seite 128)

Device Specification

Semiconductor Group 7-66

AC Characteristics (cont’d)

Parameter Symbol Limit values Unit

18 MHz clock Variable clock

1/t

CLCL

= 3.5 MHz to 18 MHz

min. max. min. max.

External Data Memory Characteristics

RD pulse width t

RLRH

233 – 6 t

CLCL

– 100 – ns

WR pulse width t

WLWH

233 – 6 t

CLCL

– 100 – ns

Address hold after ALE t

LLAX2

81 – 2 t

CLCL

– 30 – ns

RD to valid data in t

RLDV

– 128 – 5 t

CLCL

– 150 ns

Data hold after RD t

RHDX

0–0 – ns

Data float after RD t

RHDZ

–51– 2 t

CLCL

– 60 ns

ALE to valid data in t

LLDV

– 294 – 8 t

CLCL

– 150 ns

Address to valid data in t

AVDV

– 335 – 9 t

CLCL

– 165 ns

ALE to WR or RD t

LLWL

117 217 3 t

CLCL

– 50 3 t

CLCL

+50 ns

WR or RD high to ALE

high

WHLH

16 96 t

CLCL

– 40 t

CLCL

+40 ns

Address valid to WR t

AVWL

92 – 4 t

CLCL

– 130 – ns

Data valid to WR

transition

QVWX

11 – t

CLCL

– 45 – ns

Data setup before WR t

QVWH

239 – 7 t

CLCL

– 150 – ns

Data hold after WR t

WHQX

16 – t

CLCL

– 40 – ns

Address float after RD t

RLAZ

–0– 0 ns

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 ... 136 137

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