July 7th
SPI FRAM Unit Test
This unit test was run some while ago. The signals from top to bottom are;
3 nCS
1 CLK
B1 MSO interpreted SPI MOSI
B1 MSO interpreted SPI MISO
2 SIMO from MSP430FR5739
4 SOMI to MSP430FR5739
Address 0x00000000 was written with a 0xAA value and then read back again
The read sequence is;
OP Code(0x03 = READ), address byte_0, address byte_1, address_byte2
(with address_byte0 being the most significant byte)
this is followed by the FRAM outputting the value from that memory address.
The diagram confirms a textbook response.