MCF5441X Tower Module Hardware Specification
Page 13 of 31
By default voltage level from the potentiometer is connected to the ADC channel 4 of the MCF54418.
If desired the connection to the potentiometer can be disconnected and the ADC channel of the
MCF54418 can be connected to the edge connectors for use on a module connected to the TWR-ELEV.
To change the connection of ADC 4 use the Cut-Trace pad CT14.
Using a tool with a razor blade tip sever the connection between the pads 1 and 2 of the CT14. Using
a solder iron make a connection between pad 1 and pad 3.
For more details regarding the Cut-Trace pad options and the pad numbering refer to the Cut-Trace
Pad section of this document.
4.10
Temperature Sensor
TWR-M54418 uses 1-wire interface (OWIO) to interact with temperature sensor Maxim DS18B20
digital thermometer. The sensor device is powered from TWR-MCF5441X’s 3.3V power circuit. The
Parasite-Powered method (where the power source is from data bus) is not used in this platform.
By default the One-Wire digital temperature sensor is connected to the OWIO port on the MCF54418.
Using Cut-Trace pad (CT15) the signal can be connected to the TWR-ELEV connector for connection to
additional One-Wire devices. This signal can also be used to control the operating mode of a CAN
transceiver on an external Tower System module. For the CAN use case, the will be configured as a
GPIO and should be disconnected from any One-Wire devices. To disconnect the signal from the on-
board temperature sensor cut the trace between pads 1 and 2 of CT15.
For more details regarding the Cut-Trace pad options and the pad numbering refer to the Cut-Trace
Pad section of this document.
4.11
Audio Headers (DAC)
The TWR-MCF5441X uses National Semiconductor LM4889 Audio Power Amplifier to drive signal from
DAC1_OUT up to 1W into an 8 speaker.
Pin
Function
1
2
Output -
Table 8 - J4 Headers
4.12
User Interfaces
Three push buttons:
