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Agilent E1330B Digital I/O Module Register Information 119

Appendix B

A Register-Based Output Algorithm

The following algorithm describes the procedure you would use to program

the registers to transmit a byte of data to a peripheral. The algorithm follows

a flag-driven output procedure initiated by the computer. The computer polls

the Digital I/O module to see if the data has been accepted by the peripheral

by checking the Port Transfer/Control Register, bit 0 (referred to as the

acknowledge flag - hence, the name of flag-driven). Once the flag is TRUE

the computer can output new data to the port. The actual path followed by

the peripheral and the Digital I/O module to set this bit is controlled by the

handshake mode you select.

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Agilent Technologies E1330B Bedienungsanleitung Seite 121