User’s Manual
19
When you use the software
digIn
function call to read the configurable I/O, DIO00–
DIO15 are considered to be digital input channels 00–15. Note that the
digIn
function
call can also read these channels if they are set to be sinking digital outputs.
Table 2 lists the banks of digital inputs and summarizes the jumper settings.
As for the nonconfigurable digital inputs, the actual switching threshold is approximately
1.40 V. Anything below this value is a logic 0, and anything above is a logic 1. The digital
inputs are each fully protected over a range of -36 V to +36 V, and can handle short spikes
of ±40 V.
NOTE:
If the inputs are pulled up to +K or to DCIN, the voltage range over which
the digital inputs are protected changes to +K (or DCIN) – 36 V to +36 V.
When set as a sinking digital output, a configurable I/O channel can sink up to 200 mA at
up to 40 V. When you use the software
digOutConfig
function call to set the config-
urable I/O, DIO00–DIO15 are considered to be digital output channels 00–15. The output
can be set up either as a sinking output or it can be put in a high-impedance tristate.
Table 5. Banks of BL2600 Digital Inputs
Digital Inputs
Header
Pins Jumpered
Pulled Up/Pulled Down
DIO00–DIO07
JP1
1–2
Inputs pulled up to +5 V
DIO08–DIO15
JP2
3–4
Inputs pulled up to DCIN
5–6
Inputs pulled up to +K
7–8
Inputs pulled down to GND
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