20-101-0525 Rabbit Semiconductor, 20-101-0525 Datasheet - Page 38

• Manufacturer Part Number: 20-101-0525
• Description: COMPUTER SINGLE-BOARD LP3500 FOX
• Manufacturer: Rabbit Semiconductor

Specifications of 20-101-0525

• Module/board Type: Single Board Computer Module
• Product: Modules
• Processor Type: Rabbit 3000
• Sram: 512 KB
• Flash: 512 KB
• Timers: 8 bit, 10 bit
• Number Of I/os: 26
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 3 V to 30 V
• Board Size: 93 mm x 66 mm x 11 mm
• Description/function: Computer Module
• For Use With/related Products: LP3500
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 316-1115

Single-ended measurements are made by connecting the analog signal between an analog
input channel (AIN0–AIN7) and AGND. Differential measurements are made by connect-
ing a pair of differential analog signals to an adjacent pair of analog input channels
(AIN0–AIN1, …, AIN6–AIN7). The A/D converter is only capable of converting positive
voltages, and so will convert the difference between an adjacent pair of input channels,
and must be scaled for a voltage range appropriate for the voltage differences.
Table 7 lists the jumper configurations for header J3 used to set the 4–20 mA and the volt-
age measurement options.
The A/D converter inputs are factory-calibrated, and the calibration constants are stored in
flash memory. You may calibrate the A/D converter inputs at a later time using the software
functions described in Section 4.4.5, “A/D Converter Inputs.”
AIN7 can be used to monitor Vcc using the
be monitored in all the power modes, Vcc monitoring is particularly useful when the
LP3500 is being operated from an external battery to monitor the voltage being supplied
by the battery.
The
sumes about 500 µA.
engaged.
used) when the test is done to extend your battery life.
32
VccMonitorInit
CAUTION: If you have enabled the 4–20 mA current option on any of the AIN0–AIN3
NOTE: If you are using a fixed voltage range, you should recalibrate your LP3500 at that
Analog Input Channel
Turn off
channels, be careful with any voltage sources that you might connect to these inputs.
The voltage must be less than 2.5 V to keep the current across the 100 Ω resistor below
the maximum allowed current.
range.
Table 7. Header J3 Configuration for Analog I/O Options
AIN0
AIN1
AIN2
AIN3
VccMonitorInit()
The Vcc monitoring circuit itself consumes about 15 µA while it is
function requires the operation of the A/D converter, which con-
Jumper “parked” on pin 2
Jumper “parked” on pin 4
Jumper “parked” on pin 6
Jumper “parked” on pin 8
(Factory Default)
Voltage Option
(and the A/D converter if it is not going to be
VccMonitorInit
Pins 1–2 connected
Pins 3–4 connected
Pins 5–6 connected
Pins 7–8 connected
function. While Vcc can
4–20 mA Option
Fox (LP3500)