Southern Avionics Company SD100 Manual Do Utilizador

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The CONTROLLER/ MONITOR employs the new Motorola MCF5206 COLDFIRE® 
microprocessor. It encompasses the following sections:

1. COLDFIRE Processor – 32-bit
2. ADC – 8-Channel 12-bit
3. DAC – 8-Channel 8-bit
4. DDS - Radio Frequency (190K to 1800KHz)
5. DDS – Tone Frequency (400 / 1020 Hz)
6. Flash Memory – 4Mb
7. DRAM – 16Mb
8. Programmable Logic
9. Digital I/O (Read/Write)
10. UART
11. Watch Timer and NV-RAM

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COLDFIRE Processor section:

The LOGIC program creates 16MHz from 32MHz for the clock frequency of the 
microprocessor. The processor controls several peripheral functions such as memory, 
task timers, I/O bus lines, and RS-232 ports. For the dual system, the primary 
Controller / Monitor and secondary Controller / Monitor may talk to each other 
through Controller / Monitor Motherboard (SLP10012) by using 2 COM-PORT lines 
(ex: RXD & TXD). Each Controller / Monitor has one interrupt line for paying 
attention what other Controller / Monitor has something is important, then Controller / 
Monitor sets “RS-232” MUX to be enabled.

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Analog-to-Digital converter (ADC) section:

The Controller / Monitor Controller PCB has two (AD7891) 12-bit ADC chips, so 
there are 16 analog inputs. The channel selection of input range is 0 to +5 V. 

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Digital-to-Analog Converter (DAC) section:

The 8-bit DAC provides eight digitally controlled dc voltage outputs. The limited of 
output range is 0 to +5 V. The user may adjust dc analog level or turn on/off likely 
digital level. 

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RF Direct Digital Synthesizer (DDS) section:

The 50MHz clock input is for the RF DDS. The RF DDS provides two different
signal-waves (square wave and sine wave). The square wave level is 0 to +5.0 V
(recommended) and the sine wave level is 0 to 1.0 V. The DDS has 8 data digitally