AC164142 Microchip Technology, AC164142 Datasheet - Page 24

• Manufacturer Part Number: AC164142
• Description: Consumer-band BPSK 7.2kbps PLM PICtail Plus Daughter Board Other
• Manufacturer: Microchip Technology
• Series: PICtail™ Plusr

Specifications of AC164142

• Kit Application Type: Communication
• Silicon Family Name: DsPIC
• Kit Contents: 2x Power-Line Soft-Modem PICtail Plus Daughter Boards, 2x High Voltage Adapter Cables, Info Sheet
• Features: Operates On 5V And 9V
• Rohs Compliant: Yes
• Processor To Be Evaluated: dsPIC33F
• Processor Series: dsPIC33F
• Operating Supply Voltage: 5 V, 9 V
• Featured Product: AC164142 PICtail™ Plus Daughter Board
• Main Purpose: Interface, Power Line Transceiver
• Embedded: No
• Utilized Ic / Part: -
• Primary Attributes: AC Power Line Transceiver, BPSK 7.2 Kbps
• Secondary Attributes: Requires Explorer 16 Boards
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Consumer-band BPSK 7.2 kbps PLM PICtail™ Plus Daughter Board User’s Guide
DS70656A-page 24
The memory and MIPS requirements for the modem software for different baud rates
(with DMA and RAM-saving options enabled) are listed in
TABLE 3-1:
3.1.6
An application template has been provided to ease the development of customized
PLM applications. The application template can be downloaded from the
Consumer-band BPSK 7.2 kbps PLM PICtail Plus Daughter Board web site at:
www.microchip.com/powerline.
By default, the software for the daughter board is designed to operate on a carrier
frequency of 129.6 kHz. However, if required, the software can be modified to operate
at a different carrier frequency. In this case, the following need to be taken into
consideration:
• The hardware provided in the kit is designed to operate at a carrier frequency of
• It is necessary for the carrier frequency to be an integral multiple of the baud rate:
• Lower carrier frequencies result in lower maximum possible data rates
• Carrier frequency or baud rate changes outside the combinations provided in the
• Increasing carrier frequency increases the MIPS requirement for the modem soft-
129.6 kHz. Changing the carrier frequency in software will require modifications to
the hardware components, specifically the components that decide the filter cutoff
frequencies
Carrier frequency, F
include file (
digital filter coefficients
ware. For this reason, the carrier frequency must be well within the CPU’s useful
performance limit. The modem software requires approximately 0.234 to 0.303
MIPS/kHz of carrier frequency
Baud Rate
1200
2400
3600
4800
5400
7200
Developing Custom Applications
...\modem\bpsk\bpsk_filter.inc
MEMORY AND MIPS REQUIREMENTS FOR THE MODEM
C
= k * baud, k
RAM (Bytes)
700
412
316
268
252
220
ϵ
Integer
Flash (Bytes)
) will require recalculation of
2709
2709
2709
2709
2709
2709
Table 3-1
© 2011 Microchip Technology Inc.
MIPS
33.5
33.6
33.7
33.9
33.9
34.1