UCD3138064: programming flash: PFLASHCTRL1 and PFLASHCTRL2

Tomasz Ciesla

Part Number: UCD3138064
Other Parts Discussed in Thread: UCD3138A64, UCD3138

hi, in the Technical reference manual (SNIU028D) in section 15-28 there's a bug: 3138064 has two PFLASHCTRL registers: PFLASHCTRL1 and PFLASHCTRL2

My question is if I have a 64 kB program (no dual images and switching between two images, one simple 64 kB image) and I program flash is it enough to control PFLASHCTRL1 busy flag, or do I have to control PFLASHCTRL1 for first 32 kB and PFLASHCTRL2 for second 32 kB. Same goes for page/mass erase ?

Also which INTERLOCK_KEY should I use, simply #1, or #1+#2 depending on address range, or #0+#1 ??

over 1 year ago

0 Xuemei Lu over 1 year ago

TI__Intellectual 1790 points

Hello,

UCD3138064 do have two control registers PFLASHCTRL1 and PFLASHCTRL2.

PFLASHCTRL1 is for the Flash#0 and PFLASHCTRL2 is for the Flash#1.

Each Flash# has different key, please see below:

Flash#0----> 0x42DC157E

Flash#1----> 0x6C97D0C5

Best Regards,

Xuemei

0 Tomasz Ciesla over 1 year ago in reply to Xuemei Lu

Intellectual 650 points

are you sure about that? if you correct the horizontal line in the table 15-28 there's a difference between UCD3138064 and UCD3138A64:

UCD3138064 has PFLASHCTRL_1 and PFLASHCTRL_2
UCD3138A64 has PFLASHCTRL_0 and PFLASHCTRL_1

I'm asking regarding UCD3138064 so then the logic says to use key #1 and #2, not #0 and #1

+1 Xuemei Lu over 1 year ago in reply to Tomasz Ciesla

TI__Intellectual 1790 points

I know it's a little confusing, but that's correct. UCD3138064 uses PFLASHCTRL1 and PFLASHCTRL2, and UCD313A64 uses PFLASHCTRL0 and PFLASHCTRL1.

Best Regards,

Xuemei

0 Tomasz Ciesla over 1 year ago in reply to Xuemei Lu

Intellectual 650 points

so for UCD3138064 the logic says to use key #1 and #2, not #0 and #1, right?

+1 Xuemei Lu over 1 year ago in reply to Tomasz Ciesla

TI__Intellectual 1790 points

Not sure how do you define key#0,#1,#2.

For UCD3138064, it's:

Flash#0----> 0x42DC157E---->PFLASHCTRL1

Flash#1----> 0x6C97D0C5---->PFLASHCTRL2

Best Regards,

Xuemei

0 Tomasz Ciesla over 1 year ago in reply to Xuemei Lu

Intellectual 650 points

ok, that's what I was looking for. Could you reply please last part of my original post: when I work with first 32 kB I have to work thru PFLASHCTRL1 and when I work with second 32 kB PFLASHCTRL2? busy flag and page/mass erase (mass erase will erase only 32 kB)

0 Ian Bower over 1 year ago in reply to Tomasz Ciesla

TI__Genius 17090 points

Tomasz, you're right about which flash control registers you need to look at. Often we'll just have a single wait for erase which checks both.

There's an 064 programmer's manual here which describes migration between the two parts here:

https://www.ti.com/lit/ug/sluuad8b/sluuad8b.pdf.

Another change you will have to make is to move your checksum clear address to 0xfffc, and use the flash key for the second block to enable the write.

Clearing the location at 0x7ffc will make the checksum invalid, but it will also corrupt the program code at that location, so it may not run properly until you download it again.

0 Tomasz Ciesla over 1 year ago in reply to Ian Bower

Intellectual 650 points

thank you, I follow checksum placement from figure 9-28 from SLUSB72D.

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UCD3138064: programming flash: PFLASHCTRL1 and PFLASHCTRL2