Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

ST7540 Power Line communication ic

Status
Not open for further replies.

taqvi88

Newbie level 2
Joined
Jun 1, 2011
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,294
Hello every one...

i am using st7540 with its default setting and connecting it directly to PC. I have made two boards one as a transmitter and one as a receiver by configuring its pins accordingly. i send data on TXD line of st7540 at 2400 baud rate but i am unable to detect carrier frequency at TX_out line,

can any body help me in this matter

thank you
 

horace1

Advanced Member level 5
Joined
Nov 18, 2008
Messages
2,123
Helped
596
Reputation
1,188
Reaction score
573
Trophy points
1,393
Location
Norwich, UK
Activity points
13,071
for a start have you connected the UART/SPI to 1 for UART interface and RxTx to 0 for transmit?
 

taqvi88

Newbie level 2
Joined
Jun 1, 2011
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,294
yes i did. TX_out pin of st7540 is not showing any carrier frequency

thanks for reply
 

hayowazzup

Advanced Member level 4
Joined
Oct 9, 2010
Messages
117
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,296
Activity points
2,136
Hi, I am trying to use the chip and getting the same problem. I have connected UART/SPI to 1 and RxTx to 0 but it won't transmit.
I have already followed the datasheet to setup and spent so much time trying many different connections.
Does anyone know how to make this chip work??
Any help would be greatly appreciated!
 

tlogic

Member level 1
Joined
Oct 5, 2010
Messages
37
Helped
4
Reputation
8
Reaction score
4
Trophy points
1,288
Activity points
1,637
Did anyone found a solution? I also have a problem using the ST7540's SPI interface. I use RXTX as ENABLE line (that is the only explanation i can find from reading the datasheet) but the clock plays its own game. There is no sequence. Here is a screenshot of the SPI while changing RXTX line state. REG_DATA = 0.

Analyzer.png

As you can see CLOCK starts and stops at it's own.
 
  • Like
Reactions: wysi

    wysi

    points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top