DM300014 Microchip Technology, DM300014 Datasheet - Page 36

• 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

dsPICDEM™ 1.1 Development Board User’s Guide
DS70099B-page 32
Figure 3-9 shows the frequency response of the FIR filter implemented on the
dsPIC30F. The FIR filter is only employed for demonstrating filter operation.
FIGURE 3-9:
The signal frequency determined by analyzing the 256-point FFT and associated bin is
displayed on the LCD. Cycle counts for the digital filters and FFT are displayed on the
LCD.
To quit this demonstration and return to the main menu, press switch SW1.
3.3.1.3
From the Menu Options display, pressing switch SW4 launches the DTMF Generation
demo and takes you to the DTMF operation menu (Figure 3-10).
FIGURE 3-10:
When this display is active, switches SW2-SW4 control tone generation, as shown in
Table 3-2.
TABLE 3-2:
s2
s3
s4
Switch
DTMF GENERATION MODE
Moves blinking cursor to the next DTMF Tone digit
Plays the DTMF tone associated with the digit selected by s2
Plays a predetermined sequence of ten DTMF tones
DTMF TONE GENERATION CONTROLS
Advance Information
FREQUENCY RESPONSE: FIR FILTER
DTMF TONE GENERATION MENU
D
NEXT
SELECT
PLAY SEQ
TMF
T
ONE
–s2
–s3
–s4
0123456789
Function
MAIN
–s1
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