Other Parts Discussed in Thread: MSP-FET
I am developing a custom In-system programming solution for device type MSP430FR211x that runs on a Teradyne In-Circuit tester. This solution is to be used by a high-volume user of these devices. It needs to run through the SBW, to program the FRAM, because the target design does not provide probe access to the full set of JTAG signals.
Before we go any further, I should first explain that I am not using an off-the-shelf programmer. I am developing my own programmer that generates the low-level pin signal patterns as described in document SLAU320AJ
I have the solution working correctly if I program through the 4-wire JTAG. However, when I switch this over to run through SBW (but all other sequence the same) it fails.
The low-level SBW itself appears to be working. And my problem appears to be that I am just locked out of certain registers and memory when using the SBW. See by comparisons…
SYSCFG0
With JTAG I can read and write. Read 9601, write A500, read back 9600.
With SBW I can only read it. Read 9601, write A500, but read back 9601. Read works but write does not.
WDT
I am able to write and read the WDT register with either JTAG or SBW
SRAM at 2000
With JTAG I can write AAAA and read back AAAA
With SBW I can write AAAA but read back is 0000. Not enough information to tell if it is the write or read that has malfunctioned.
Chip ID at 01A04
With JTAG I can read 82FA
With SBW I read 0000
I should note that even with JTAG I could not read the Chip ID using the ReadMem_430Xv2 function. In order to access this I had to SetPC_430Xv2(1A04) followed by a quick read.
I am working with virgin parts so I am assuming that the entire FRAM contains 1s.
Is there some register some place that needs to be modified that will allow SBW to access the same registers that JTAG can?
Is there some access privilege that JTAG has that SBW does not, and how can I fix that?
