Measurement-computing PCM-DAS08 Manuel d'utilisateur télécharger pdf (Page 12)

BASE + 1 - A/D MSB (4 bits)

Read data

A/D8A/D9A/D10A/D11XXXX

01234567

BASE + 2 - A/D Channel, Digital Out & Status

Write control

MA0MA1MA2XDOut0DOut1DOut2X

01234567

Set the digital output bits as 0 for a TTL low and 1 for a TTL high. You must know

the current value of the digital outputs (the last value written) if you want to change

the A/D channel and maintain the digital output lines at their current status. There is

no read back for the digital outputs.

Table 5-1. A/D Channel Address Codes

Set A/D channel address via MA2 MA1 MA0

Channel 0 0 0 0

Channel 1 0 0 1

Channel 2 0 1 0

Channel 3 0 1 1

Channel 4 1 0 0

Channel 5 1 0 1

Channel 6 1 1 0

Channel 7 1 1 1

The digital outputs are latched, and will maintain the last value until overwritten or the

computer or PCM-DAS08 is reinitialized.

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Measurement-computing PCM-DAS08 Manuel d'utilisateur Page 12