Rabbit BL2600, User Manual

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User’s Manual 23
3.2.4 Configurable I/O
The BL2600 has 16 configurable I/O that may be configured individually in software as
either digital inputs or as sinking digital outputs. By default, a configurable I/O channel is
a digital input, but may be set as a sinking digital output by using the
digOutConfig
function call. The inputs are factory-configured to be pulled up to +5 V, but they can also
be pulled up to +K or DCIN, or pulled down to 0 V in banks by changing a jumper as
shown in Figure 12.
CAUTION: Do not simultaneously jumper more than one setting on a particular
jumper header (JP1 and JP2) when configuring a bank of configrable I/O.
Figure 12. BL2600 Configurable I/O DIO00–DIIO15 [Inputs Pulled Up—Factory Default]
100 k W
27 k W
+K
DCIN
+5 V
SINKING
OUTPUT
27 k W
220 W
DIGITAL
INPUT
DIO00–DIO15
Factory
Default
setting
+K
Sinking
Output
setting
+K
Buffer
Latch
Rabbit® 3000
Microprocessor
GND