User Manual

Apex Data Sheet
892-00000-000-05-201302 13
Byte Format
Byte 0
0xFE
Return Format
The data is returned in Binary format and read in by the host through End Point 1 In. The structure for
the return information is as follows
Byte Description Comments
0-1 Number of Spectral Data Values – WORD(s) LSB | MSB order
2-5
Integration Time - WORD
Integration time in µs – LSW | MSW.
Within each word order is LSB | MSB
6
Lamp Enable 0 – Signal LOW
1 – Signal HIGH
8 Spectral Acquisition Status For internal use
9
Packets In Spectra Returns the number of Packets in a
Request Spectra Command.
10
Power Down Flag 0 – Circuit is powered down
1 – Circuit is powered up
11
Packet Count Number of packets that have been
loaded into End Point Memory
12 Reserved
13 Reserved
14
USB Communications Speed 0 – Full Speed (12Mbs)
0x80 – High Speed (480 Mpbs)
15 Reserved