Siemens EF 88H Series Bedienungsanleitung PDF herunterladen (Seite 106)

Semiconductor Group 10-9

Device Specifications

C501

10.6 AC Characteristics for C501-L40 / C501-1R40

= 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 25ns is permissible. This limited bus contention will not

cause any damage to port 0 Drivers.

Parameter Symbol Limit Values Unit

40 MHz

Clock

Variable Clock

CLCL

= 3.5 MHz to 40 MHz

min. max. min. max.

ALE pulse width

LHLL

35 – 2 t

CLCL

– 15 – ns

Address setup to ALE

AVLL

10 – t

CLCL

– 15 – ns

Address hold after ALE

LLAX

10 – t

CLCL

– 15 – ns

ALE low to valid instr in

LLIV

–55– 4 t

CLCL

– 45 ns

ALE to PSEN

LLPL

10 – t

CLCL

– 15 – ns

PSEN

pulse width t

PLPH

60 – 3 t

CLCL

– 15 – ns

PSEN

to valid instr in t

PLIV

–25– 3 t

CLCL

– 50 ns

Input instruction hold after PSEN

PXIX

0–0 – ns

Input instruction float after PSEN

PXIZ

–20– t

CLCL

– 5 ns

Address valid after PSEN

PXAV

20 – t

CLCL

– 5 – ns

Address to valid instr in

AVIV

–65– 5 t

CLCL

– 60 ns

Address float to PSEN

AZPL

– 5 – – 5 – ns

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 120 121

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