USBIO24 ELEXOL, USBIO24 Datasheet - Page 8
![DIGITAL I/O MODULE, USB TO 24 I/O](/photos/24/39/243949/114604206-40_sml.jpg)
USBIO24
Manufacturer Part Number
USBIO24
Description
DIGITAL I/O MODULE, USB TO 24 I/O
Manufacturer
ELEXOL
Type
USB I/O Moduler
Datasheet
1.USBIO24.pdf
(17 pages)
Specifications of USBIO24
Development Tool Type
Digital I/O Module
Tool / Board Application
Digital Signal Transfer
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
USB I/O 24 R Datasheet
4. To read the value returned from the device you will have to send the SPI device null characters to
keep the SPI clock going. For example if you are expecting a certain number of bytes in return to a
command which was sent, you send "S" + null character for the number of bytes you wish to read.
In the example image, this can be seen in the last two bytes which are sent (implemented with don't
cares) and on the input pin you will have the valid data from the device.
Note: you may have to send out leading zero's and don't cares depending on device you are
communicating with. e.g. seven leading zero's then a start bit as per the image below.
Example image for SPI communications with the MCP3004/3008 using 8 bit segments taken from
the MCP3004./3008 datasheet. (http://www.microchip.com)
Elexol Pty Ltd
Version 1.1
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