Measurement-computing Digital232 Manuel d'utilisateur télécharger pdf (Page 38)

Section 3 Command Descriptions

3.16

Port Pn

The

Port

command determines which port is selected for output and input data.

In the default mode (P0), all ports are selected. The

thru

commands select a

specific eight bit port.

The Output Select (Gn) command is used to determine whether input or output

port data is sent out the serial port when requested. Data in modes P1 through P5 is

input or output in groups of eight bits.

All five ports are selected

Port 1 is selected

Port 2 is selected

Port 3 is selected

Port 4 is selected

Port 5 is selected

Example:

reset the Digital 232

P4 select port 4

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Measurement-computing Digital232 Manuel d'utilisateur Page 38