External Speaker (J18); Push-Button Reset (J18); Analog Input (J22) - VersaLogic VL-EBX-37 Reference Manual

External Speaker (J18)

A miniature 8 ohm speaker can be connected between J18 pins 50 and 49. A speaker is provided
on the VL-CBR-5009 breakout board.

Push-Button Reset (J18)

Connector J18 includes an input for a push-button reset switch. Shorting J18 pin 37 to ground
causes the VL-EBX-37 to reboot. This connector is protected against ESD damage.
A reset button is provided on the VL-CBR-5009 breakout board.

Analog Input (J22)

The VL-EBX-37 uses a multi-range, 12-bit Linear Technology LTC1857 A/D converter with
eight single-ended input signals (even and odd analog channels, for example inputs 1 and 2, can
also be combined as differential inputs). The converter has a 100 kilo-samples-per-second (Ksps)
sampling rate, with a 4 µs acquisition time, with per-channel input ranges of 0 to +5V, ±5V, 0 to
+10V and ±10V.
The VL-EBX-37 A/D converter is controlled using the SPI registers. The A/D converter is
accessed via SPI slave select 5 (writing 5h to the SS field in SPICONTROL).
See "SPI Registers" for a complete description of the registers.
See the Linear Technology LTC1857 A/D Converter Datasheet
Warning!
Application of analog voltages greater than +25V or less than -25V can damage
the converter.
Note:
Custom models of the VL-EBX-37 can accommodate 16 A/D channels. Contact
Sales@VersaLogic.com
EBX-37 Reference Manual
for more information on custom orders.
Interfaces and Connectors
for programming information.
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