AC164142 Microchip Technology, AC164142 Datasheet - Page 27

• 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

The transmitter starts sending when there is at least one byte to send. A frame is ter-
minated when there is no more data in the input buffer or when the 64th payload byte
has been transmitted. As long as the application keeps providing data to send, the
transmitter will transmit 64 byte frames. If a frame checksum is invalid, the receiver will
try to resynchronize, but the frame contents will be transferred to the UART interface.
The UART configuration for this demonstration is:
• 19200 bps
• 8-N-1
• RTS/CTS flow control
3.2.4
Stream Demonstration
This demonstration implements a unidirectional link tester to test the power line
communication link.
There are two applications in this demonstration: a transmitter and a receiver. The
transmitter sends a stream of frames with a constant length and payload. The receiver
checks the received frames and displays statistics on the LCD and via the UART. The
following statistics are available:
• TX: Number of frames transmitted in total
• RX: Number of frames received in total
• OK: Number of frames received correctly
• ERR: Number of frames received with errors
• CRC: Number of frames that had CRC errors
• PAY: Number of frames with at least one payload error
• TRU: Number of truncated frames. A frame is truncated if bit synchronization was
lost before the expected number of octets were received.
Each frame (of 128 byte length) is composed of 16 bytes of preamble, 110 bytes of data
and 2 bytes of CRC. The following push buttons can be used to control the
demonstration application:
• S3: Next LCD view
• S6: Previous LCD view
• S4: Clear all counters
The transmitter application has two LCD views:
• Frame statistics: TX count
• Application configuration (carrier frequency, modulation and baud rate)
On reset, the transmitter sends the application configuration summary over the UART
and prints an asterisk (*) symbol on every transmitted frame. After each 16 frames it
prints the total number of frames transmitted so far.
The receiver application has three LCD views:
• Frame statistics: RX, OK and ERR count
• Error statistics: CRC, PAY and TRU count
• Application configuration (carrier frequency, modulation and baud rate)
On reset, the receiver sends the application configuration summary over the UART.
Then, every 5 seconds, it prints all packet statistics in a human-readable form. By
increasing the debug level upon compilation, it is also possible to send detailed reports
about each frame. This option is disabled by default. The detailed reports have the
following format:
• −: Preamble character received
• _: Non-preamble character received out of frame
© 2011 Microchip Technology Inc.
DS70656A-page 27