lattice machXO2 VCCP pin

[Antti]

Hi anyone knows how to connect it? it is still present in the pinout XLS files, but the datasheets have no reference to VCCP.

we just soldered XO2 device to our superduper new universal protoboard that allows any pad of the TQFP144 to be "routed" to any of 12 global spines by using 0 ohm 0603 components.

to our big surprise the XO2 did wake up alive instantly and is responding to JTAG ID query too, well VCCP is in air still.

we are waiting diamond 1.1 to finish download, maybe the XO2 gets programmed at once, or then if not we are left with the puzzel about VCCP pin, it is in same bank as JTAG pins, i assume its is Programming voltage, but should it be connected to VCC core? or 3.3V no idea

Antti

 

[Thomas Heller]

Am 15.02.2011 15:51, schrieb Antti:

Hi anyone knows how to connect it? it is still present in the pinout
XLS files, but the datasheets have no reference to VCCP.

we just soldered XO2 device to our superduper new universal
protoboard that allows any pad of the TQFP144 to be "routed" to any
of 12 global spines by using 0 ohm 0603 components.

to our big surprise the XO2 did wake up alive instantly and is
responding to JTAG ID query too, well VCCP is in air still.

we are waiting diamond 1.1 to finish download, maybe the XO2 gets
programmed at once, or then if not we are left with the puzzel about
VCCP pin, it is in same bank as JTAG pins, i assume its is
Programming voltage, but should it be connected to VCC core? or 3.3V
no idea

Antti

Hm, my copy of ds1035.pdf (advance data sheet, nov 2010) mentions VCCP:

VCCP — VCCP – The Programming power supply pin. This pin powers up the
programming circuitry for the on-chip Flash memory. Dedicated pins.

Thomas

 

[Antti]

hm.. i also have nov 2010 copy, and ONLY reference it has is:

"Removed references to VCCP"

!? mystery!

Antti

 

[Antti]

unbelievable almost

first try, all work, leds are on the board..
VCCP is open...

Antti

 

[-jg]

On Feb 16, 5:17 am, Antti <antti.luk...@googlemail.com> wrote:

unbelievable almost

first try, all work, leds are on the board..
VCCP is open...

Antti

So Pgm/erase work with floating Vpp ?

Perhaps if Vpp is 'surplus' they started allowing if for freedom on
Flash cell, but found it can work ok on the usual Vcc, and so
internally bond it ?

-jg

 

[Antti]

hi

YES, VCCP floating, JTAG flashing OK, and FPGA working as well

pictures here:
http://www.flickr.com/photos/trioflex/

Antti

 

[Alex]

On Feb 16, 12:31 am, Antti <antti.luk...@googlemail.com> wrote:

hi

YES, VCCP floating, JTAG flashing OK, and FPGA working as well

pictures here:http://www.flickr.com/photos/trioflex/

Antti

Hi All,
Just wanted to clarify that Vccp pin is not used in machXO2 (ES &
production devices) and so can be left floating. The documentation
will be modified to reflect the fact.

Alex,

Lattice FAE, writing unofficially from home

 

[Antti]

Super!

the datasheet already was up to date, but the pinout listing still included this pin, that is what caused confusion!

The XO2 demo board is already shipped to prepared for Embedded World show

Antti writing officially from the office