Measurement-computing Digital488 Manual do Utilizador descarregar pdf (Página 33)

Section 3 Command Descriptions

3.3

Bit Clear Bn

The

Bit Clear

command will clear to a logic zero an output bit described by the

argument 'n'. Clearing a bit may represent either a 0 volt or +5 volt output, depending

on whether an

Invert

command (

I16

) has been sent. If data is active high (default

condition), then

Bit Clear

outputs 0 volts. When multiple

Bit Clear

commands are

used in the same command string, an

Execute

command (

) must follow each

command.

The bit which is being cleared must have been defined as an output by the

Configure

command in order to be valid. The

Strobe

output line is not pulsed when

the

Bit Clear

command is sent.

Bit n (1 thru 40) is cleared to a logic 0

Example:

CLEAR 718

reset the

Digital488

OUTPUT 718;"C5X"

configure all ports as output

OUTPUT 718;"A7XA8XA9X"

set bits 7, 8, and 9 to +5 volts

OUTPUT 718;"B7X"

clear bit 7 to zero volts

OUTPUT 718;"B8XB9X"

clear bits 8 and 9 to zero volts

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 82 83

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