E-7
Configuring the Spider8 with the setup programÝ Setup program
Spider8
Fixed operating data:
Parity Stop bits Data bits
Operating modes of the PC parallel port:
Setup commands and their responses in Spider8:
Centronics printer format
(irrespective of the operating mode selected and the PC
interface)
Measurement data transfer from Spider8 to PC:
Four operating modes, which are above all different in the
accessible data throughput.
Nibble mode:
This operating mode works with any standard parallel interface. The
data bytes from the Spider8 are sent sequentially as 4 bit packages
(nibbles) via the status circuits.
Data transfer rate: 13 000 bytes/s (6500 samples/s)
Bit8 mode:
It is assumed here that the four control circuits coming from the PC
are designed as open collector drivers and the line level is recorded
separately as an input. This is the case with all ”old” compatible
parallel interfaces; more modern interfaces in the operating modes
”PS/2”, ”ECP” or ”EPP” do not allow this. Only 8 bits are transferred
simultaneously.
Data transfer rate: 38 000 bytes/s (19 000 samples/s)
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