TDMA Digital Radio Processor
CMX7161
R3-R6 (kOhms)
22
C5-C8 (pF)
270
Figure 6 Recommended External Components – 2-Point Output Reconstruction Filter
5.4
GPIO Pins
By default, after the Function Image™ has been loaded, all GPIO pins are configured as inputs with an
internal bus-hold circuit. This avoids the need for users to add external termination (pullup/pulldown)
resistors onto these inputs. The bus-hold is equivalent to a 75kΩ resistor either pulling up to logic 1 or
pulling down to logic 0. As the input is pulled to the opposite logic state by the user, the bus-hold resistor
will change, so that it also pulls to the new logic state. The internal bus-hold can be disabled or re-enabled
using the Programming Register.
2013 CML Microsystems Plc
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CMLMICRO [ CML MICROCIRCUITS ]
