Designing LPC1769 Based Board

lpcware · ‎06-15-2016

Content originally posted in LPCWare by cesimkaol on Thu Feb 07 15:16:48 MST 2013
My microcontroller lecture project is designing very simple LPC 1769 based board in order to learn how to use pcb tools , fabrication and etc.

There will be only leds and switches. the aim of project is

*How to design pcb for board and how to programming it?

I have to use ISP programmer and Flash Magic...according to my research on schematics of 1769 based developped board , I should use P0.2 , P0.3 and P2.10 for ISP programmer...

I figure out there will be a max3232 for ttl logic between COM port and 1769 .
TXD0,RXD0 should be connected to T1in and R1out of max3232.But ı cant figure out how ISP's role and where should ı put it...

Thank you for your replies...

lpcware · ‎06-15-2016

Content originally posted in LPCWare by Ex-Zero on Thu Feb 07 17:14:11 MST 2013

Quote: cesimkaol
... I should design P2.10 pin as a reset button ...While programming Lpc p2.10 pin should be grounded...

:eek:

-P2.10 as ISP Pin (10k pullup and switch to GND)

-RST_N (Pin 17) as Reset (10k pullup and button to GND)

lpcware · ‎06-15-2016

Content originally posted in LPCWare by cesimkaol on Thu Feb 07 17:03:46 MST 2013
According to information given above , I can directly connect FTDI chip and LPC's TxD / RxD UART pins(p0.2 and p0.3) and I should design P2.10 pin as a reset button ...While programming Lpc p2.10 pin should be grounded...

Thank you Zero ...

I will put basic schematic here ...And I want you to examine it pls :)

Thank you for your replies...

lpcware · ‎06-15-2016

Content originally posted in LPCWare by Ex-Zero on Thu Feb 07 15:51:17 MST 2013
#1 Minimal requirements are TxD / RxD UART connection, ISP switch (= to pull low ISP pin), Reset button :)

#2 I don't understand why you want to use RS232 instead of USB (http://www.flickr.com/photos/58892165@N08/6582736325 , http://www.flickr.com/photos/58892165@N08/6582736169 ) with FTDI (http://www.ftdichip.com/Products/ICs/FT232R.htm)

#3 Instead of adding a serial converter to board I would recommend to use an USB-UART converter (http://www.flickr.com/photos/58892165@N08/6973435771/in/photostream/) and just add a simple TxD / RxD / GND connector to UART :eek: