Measurement-computing Digital488 Manuel d'utilisateur télécharger pdf (Page 22)

Section 2 Getting Started

2.6

SERVICE INPUT

(Input).

EXTERNAL DATA READY [EDR]

(Input).

47,48 Not used.

+5 Volts

(

Do not exceed 50 mA load

I/O COMMON (Gnd).

2.3.3 Control Lines

Five control lines enable handshaking of digital I/O data transfer to the

Digital488

. They are automatically activated with the corresponding I/O

activity and can also be independently activated with the

Handshake

(Hn)

command.

2.3.3.1 Clear

(Pin 41)

The

Clear

output is pulse for approximately 50

microseconds after a Device Clear (DCL), Selected Device Clear

(SDC), or Interface Clear (IFC) command has been sent on the bus.

The

Clear

line is normally active high. The

Invert

command (

)

will program it active low. The

Handshake

command

(H0)

can

pulse the

Clear

line, independent of any I/O operations.

Timing Diagram for Clear Output

Clear

65 µS typ 50 µS typ

DCL, SDC or IFC

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 82 83

Commentaires sur ces manuels

Pas de commentaire

Measurement-computing Digital488 Manuel d'utilisateur Page 22

Commentaires sur ces manuels

Produits connexes et manuels pour Matériel Measurement-computing Digital488