Siemens EF 88H Series Bedienungsanleitung PDF herunterladen (Seite 102)

Semiconductor Group 10-5

Device Specifications

C501

10.4 AC Characteristics for C501-L / C501-1R / C501-1E

= 5 V + 10 %, – 15 %; V

= 0 V T

= 0 °C to 70 °C for the SAB-C501

= – 40 °C to 85 °C for the SAF-C501

(

for port 0, ALE and PSEN outputs = 100 pF; C

for all other outputs = 80 pF)

Program Memory Characteristics

*) Interfacing the C501 to devices with float times up to 75 ns is permissible. This limited bus contention will not

cause any damage to port 0 Drivers.

Parameter Symbol Limit Values Unit

12 MHz

Clock

Variable Clock

CLCL

= 3.5 MHz to 12 MHz

min. max. min. max.

ALE pulse width

LHLL

127 – 2t

CLCL

– 40 – ns

Address setup to ALE

AVLL

43 – t

CLCL

– 40 – ns

Address hold after ALE

LLAX

30 – t

CLCL

– 53 – ns

ALE low to valid instr in

LLIV

– 233 – 4t

CLCL

– 100 ns

ALE to PSEN

LLPL

58 – t

CLCL

– 25 – ns

PSEN

pulse width t

PLPH

215 – 3t

CLCL

– 35 – ns

PSEN

to valid instr in t

PLIV

– 150 – 3t

CLCL

– 100 ns

Input instruction hold after PSEN

PXIX

0–0–ns

Input instruction float after PSEN

PXIZ

–63– t

CLCL

– 20 ns

Address valid after PSEN

PXAV

75 – t

CLCL

– 8 – ns

Address to valid instr in

AVIV

– 302 – 5t

CLCL

– 115 ns

Address float to PSEN

AZPL

0–0–ns

1 2 ... 97 98 99 100 101 102 103 104 105 106 107 ... 120 121

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