DM300014 Microchip Technology, DM300014 Datasheet - Page 35

• Manufacturer Part Number: DM300014
• Description: BOARD DEMO DSPICDEM 1.1 GEN PURP
• Manufacturer: Microchip Technology

Specifications of DM300014

• Processor To Be Evaluated: PIC30F
• Data Bus Width: 16 bit
• Interface Type: RS-485, CAN, SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

 2003 Microchip Technology Inc.
Figure 3-7 depicts the flow of data from the time the analog input is converted by the
dsPIC30F device to the time the frequency is estimated.
FIGURE 3-7:
Figure 3-8 shows the frequency response of the IIR filter implemented on the
dsPIC30F. The IIR filter is only employed for demonstrating filter operation.
FIGURE 3-8:
Generated
Sinewave
x
1
(t)
Demonstration Program Operation
Advance Information
DSP OPERATIONS FLOW DIAGRAM
FREQUENCY RESPONSE: IIR FILTER
Low-Pass
To display
on LCD
Filter
x
2
(t)
Magnitude
computation &
peak-frequency
detection
8 kHz sampling
A/D Converter
12-bit,
x[n]
DS70099B-page 31
IIR/FIR filter
Bandpass
T
FILT
FFT
T
256
X
FFT
2
y[n]