Reply by Al Clark February 4, 20082008-02-04
Roman Rumian <usun_torumian@agh.edu.pl> wrote in news:fo42iv$abi$1
@news.agh.edu.pl:

> Hi Al, > > Al Clark napisa&#2013266099;(a): >> Roman Rumian <usun_torumian@agh.edu.pl> wrote in news:fo2jmr$1ml$1 >> @news.agh.edu.pl: >> >>> Hi friends, >>> >>> do anybody knows, where the Vdd pin (voltage ?) is described in >>> ADSP-21371 datasheet or any other document ??? >>> >> >> The core supply is 1.2V, the IO supply is 3.3V > > ok, so we have Vddint and Vddext pins, but where are described separate > Vdd pins ?? > > I looked at 21375 evm module schematic diagram, and Vdd pins are > connected to Vddint supply, but why ? > > Thank you. :-) > > Roman Rumian >
I see what you are talking about. On the pin assignments, it shows Vddext and Vdd. This is a mistake. The Vdd should be labeled Vddint. There is no special Vdd. The core voltage is 1.2V. Al Clark Danville Signal Processing, Inc.
Reply by Roman Rumian February 3, 20082008-02-03
Hi Al,

Al Clark napisa&#2013266099;(a):
> Roman Rumian <usun_torumian@agh.edu.pl> wrote in news:fo2jmr$1ml$1 > @news.agh.edu.pl: > >> Hi friends, >> >> do anybody knows, where the Vdd pin (voltage ?) is described in >> ADSP-21371 datasheet or any other document ??? >> > > The core supply is 1.2V, the IO supply is 3.3V
ok, so we have Vddint and Vddext pins, but where are described separate Vdd pins ?? I looked at 21375 evm module schematic diagram, and Vdd pins are connected to Vddint supply, but why ? Thank you. :-) Roman Rumian
Reply by Al Clark February 3, 20082008-02-03
Roman Rumian <usun_torumian@agh.edu.pl> wrote in news:fo2jmr$1ml$1
@news.agh.edu.pl:

> Hi friends, > > do anybody knows, where the Vdd pin (voltage ?) is described in > ADSP-21371 datasheet or any other document ??? >
The core supply is 1.2V, the IO supply is 3.3V Al Clark Danville Signal Processing
Reply by Roman Rumian February 2, 20082008-02-02
Hi friends,

do anybody knows, where the Vdd pin (voltage ?) is described in 
ADSP-21371 datasheet or any other document ???

Regards

Roman Rumian

P.S Maybe FREESCALE could organise a seminar for AD staff, how to write 
technical documentation of microprocessors ?!
The ADSP processors documentation is the worse I ever red.