101-0577 Rabbit Semiconductor, 101-0577 Datasheet - Page 27

• Manufacturer Part Number: 101-0577
• Description: KIT DEV FOR BL2500 COYOTE
• Manufacturer: Rabbit Semiconductor
• Series: Coyoter
• Type: Single Board Computers (SBC)r

Specifications of 101-0577

• Contents: SBC, Dev. Board, AC Adapter, Cable and Dynamic C® CD-ROM
• Product: Modules
• Data Bus Width: 10 bit
• Processor Type: Rabbit 3000
• Sram: 128 KB
• Flash: 256 KB
• Number Of I/os: 24
• Backup Battery: 3 V Lithium Coin Type
• Operating Voltage: 8 V to 40 V
• Power Consumption: 1 W
• Board Size: 100 mm x 100 mm x 29 mm
• Description/function: Computer Module
• Interface Type: Ethernet
• For Use With/related Products: BL2510
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

3.3 Digital I/O
3.3.1 Digital Inputs
The Coyote has 16 digital inputs, IN00–IN15. IN00–IN13 and IN15 are each protected
over a range of –36 V to +36 V, and IN14 is protected over a range of –36 V to +5 V. The
inputs are factory-configured to be pulled up to +3.3 V; IN00–IN07 can also be pulled up
to +K or they can be pulled down to 0 V by changing a surface-mounted 0  resistor.
Figure 10 shows a sample digital input circuit. IN00-IN07 and IN15 are protected against
noise spikes by a low-pass filter composed of a 22 k series resistor and a 10 nF capacitor.
User’s Manual
Coyote series boards can be made to order in
volume with the digital inputs pulled up to +K or
pulled down to 0 V. Contact your authorized Rab-
bit distributor or your sales representative at for
more information.
The actual switching threshold between a zero
and a one is between 0.9 V and 2.3 V for all 16
inputs.
IN00–IN13 and IN15 are each fully protected
over a range of -36 V to +36 V, and can handle
short spikes of ±40 V. IN14 is protected over a
range of -36 V to +5 V.
Figure 10. Coyote Digital Inputs [Pulled Up—Factory Default]
W
W
W
Figure 11. Coyote Digital Input
Protected Range
21