Hercules III User Manual Rev A.2
www.diamondsystems.com
Page
15
4.2.9
CAN Interface
Hercules III provides one channel of CAN 2.0 with transceiver.
4.2.10
Data Acquisition
The board provides the following data acquisition capabilities.
Type of I/O
Characteristics
Analog Input
32 single-ended/16 differential inputs, 16-bit resolution.
250KHz maximum aggregate A/D sampling rate.
Programmable input ranges/gains:
+/-10V, +/-5V, +/-2.5V, +/-1.25V, 0-10V, 0-5V, 0-2.5V.
A/D 2048 FIFO for reliable high-speed sampling and scan operation.
Analog Output
Four analog outputs, 12-bit resolution.
±10V and 0-10V output ranges.
Indefinite short circuit protection on outputs.
PWM
4 pulse width modulator circuits
Digital I/O
40 programmable digital I/O, 3.3V and 5V logic compatible.
Counter/Timers
One 24-bit counter/timer for A/D sampling rate control.
One 16-bit counter/timer for user counting and timing functions.
On board I2C flash EEROM is provided for auto-calibration value storage.
4.2.11
PC/104-
Plus
Expansion Bus
The PC/104-
Plus
expansion bus offers both the ISA bus and PCI bus, and enables installation of additional I/O
boards. It consists of two stack-through connectors press-fit onto the board, enabling expansion both above and
below the board.
4.2.12
Power Supply
Hercules III contains an on-board DC/DC power supply with 55 watts of output power. With approximately 13.8W
required to power the SBC, this leaves 35W available to power peripherals and add-on boards. The +7-40VDC
input range means that Hercules III is compatible with vehicle, battery or industrial power sources. The on-board
supply features ACPI compatibility for intelligent power management.
4.2.13
Battery Backup
Hercules III includes a backup battery for CMOS RAM and real-time clock backup. The battery is mounted on the
top side of the board. The battery provides a minimum of 5 years backup capability at 25
o
C with the system
powered off.
A connector and jumper are provided to disable the on-board battery and enable use of an external battery
instead. External battery voltage requirement is 3.3V +/- 10%. The jumper also clears the CMOS RAM when it is
removed and no external battery is connected.
4.2.14
Watchdog Timer
A programmable watchdog timer (WDT) is included to provide an automatic reset in case of system hang. The
WDT may be retriggered either by a software command or a digital input. The system will reset when the WDT is
enabled and expires. The WDT circuitry is integrated in the FPGA chip.