Search found 13 matches

by Dmil
Thu Feb 22, 2018 7:11 pm
Forum: Q&A
Topic: Driving RST pin
Replies: 6
Views: 4014

Re: Driving RST pin

Thank you!
v1.14 doesn't have this text.
by Dmil
Thu Feb 22, 2018 6:56 pm
Forum: Q&A
Topic: Driving RST pin
Replies: 6
Views: 4014

Re: Driving RST pin

"Who will win on this logic gate fight?" What a fight? It is just AND logic, POR_N & XRST_N = RST_N. I am asking about driving RST_N pin. I've found the old doc, v1.6: I Schematics Design Check List I.3 Power on reset The RST_N and TRST_N pins are asserted (low) during or after power u...
by Dmil
Thu Feb 22, 2018 3:54 pm
Forum: Q&A
Topic: Driving RST pin
Replies: 6
Views: 4014

Re: Driving RST pin

RST_N input of MPU is driven by function (TRST_N & POR_N).
Why a push-pull output is not recommended?
I don't see any reason of using OD except of the high output current.
It was a special recommendation in one of the old doc.

P.S.
It is refactoring our working custom board.
by Dmil
Thu Feb 22, 2018 2:18 pm
Forum: Q&A
Topic: Driving RST pin
Replies: 6
Views: 4014

Driving RST pin

Previous versions of MPU documentations had Errata section and it said: "To guarantee a logic low is seen on the pins RST_N, TRST_N, TMS, and TDI, the driving circuit should present an impedance of less than 100ohm to ground. Usually this is not a problem for CMOS drivers driving single inputs....
by Dmil
Fri May 12, 2017 1:25 pm
Forum: Q&A
Topic: VDDIOT voltage
Replies: 3
Views: 4873

Re: VDDIOT voltage

We don't need VDDIOT. Is it good for CPU if VDDIOT will be left unpowered?
by Dmil
Fri May 12, 2017 12:09 pm
Forum: Q&A
Topic: VDDIOT voltage
Replies: 3
Views: 4873

VDDIOT voltage

XE216-512-TQ128 Datasheet P.21 If the PHY supports a 3.3V IO voltage, then a 3.3V supply can be used for VDDIOT. P.23 The signal description (Section 4) specifies which I/O is powered from which power-supply VDDIOT powers the RGMII IO pins, and must be provided with 2.5V. P.29 Both VDDIOT 3v3 and VD...
by Dmil
Wed May 04, 2016 9:46 am
Forum: General Questions
Topic: AES67 supporting
Replies: 3
Views: 18478

AES67 supporting

do XMOS plans to make AES67 (or newest AES70 or compatible stream) support?
by Dmil
Wed Nov 25, 2015 8:14 am
Forum: Q&A
Topic: xCORE-200-Multichannel-Audio-Platform boot source
Replies: 1
Views: 1698

xCORE-200-Multichannel-Audio-Platform boot source

<t>XE216-512-TQ128-Datasheet_1.6.pdf, "8 Boot Procedure" says that boot source depends on X0D06 X0D05 X0D04.<br/> <br/> Pull-up 1K resistor on SPI_CS and internal pull-down resistors on X0D06 X0D05 X0D04 make MPU starts from QSPI Flash. Is this true?<br/> <br/> To start from xSYS X0D06 must be 1.<br...
by Dmil
Tue Mar 24, 2015 9:27 am
Forum: Q&A
Topic: How to build project?
Replies: 2
Views: 2619

Answer

<t>OK.<br/> <br/> But what about second part of the question?<br/> <br/> 2) module_usb_audio\main.xc. Unresolved inclusion: "xud.h"<br/> module_usb_audio\warnings.xc. Unresolved inclusion: "customdefines.h"<br/> <br/> - I see these problems only if I open the .xc file, so it possible there are simil...
by Dmil
Fri Mar 20, 2015 11:45 am
Forum: Q&A
Topic: How to evaluate multi audio channels in XMOS U16 based MCA k
Replies: 2
Views: 2742

Answer 3185

How seen 4 channels for OS?

Is this 4 separate stereo devices or one device with 4 streams?