1) I'm not sure, but I think J3 is for factory programming the rlink/dongle chip ST72f651.
2) There are Ramtron FRAM chips with an SPI interface. It may be quite easy to use an STM32's SPI peripheral to talk to a FRAM Device. SPI2 of the STM32s is avaialable on the expansion pads on the underside the primer board via pads 1(mosi) 3(miso), 5(clock), [7(slave select - if applicable)]. If the STM32 is a master you'd need a line for chip select.
If you hold the primer in front of you so you are looking at the back with the battery link at the top, then the expansion port pads are numbered as follows;-
20,19
18,17
16,15
..etc..
8,7(SPI2 Slave Select)
6,5(SPI2 Clock)
4,3(SPI2-MISO)
2,1(SPI2-MOSI)
A good thing to do with the IRDA/Uart port is to put an RS232 (or RS485) driver chip on it so that it can talk to a PC serial port. Something like a MAX232. ST make an equivalent that is used on the STM3203b-eval. Circuit here;
http://www.st.com/stonline/products/lit … /13472.pdf
see page32
