Fx2grok

2017-10-03T21:58:49Z

Izzy84075: Add a link to esden's GitHub repository for the fx2grok-flat, and start on a 16-channel fx2grok-wide

{{lowercase}}
The '''fx2grok''' family consists of four devices (fx2grok-flat, fx2grok-tiny, fx2grok-bga, fx2grok-wide) of '''very small''', Open Hardware FX2-based logic analyzers.

The schematics and layouts are done from scratch in [http://kicad-pcb.org Kicad], and are released under the [https://creativecommons.org/licenses/by-sa/3.0/ CC-BY-SA 3.0] or [https://creativecommons.org/licenses/by-sa/4.0/ CC-BY-SA 4.0] license.

Using the open-source [[fx2lafw]] firmware (and sigrok, of course) you can use these devices as 8-channel(Or 16-channel, for the fx2grok-wide) logic analyzers.

== Device comparison ==

'''Note''': All of this is work in progress and might change at any time!

{| border="0" style="background-color: #eeeeee; font-size: smaller" class="alternategrey sortable sigroktable"
|- bgcolor="#6699ff"
! align="left" width="10%" | Item
! align="left" width="22.5%" | fx2grok-flat
! align="left" width="22.5%" | fx2grok-tiny
! align="left" width="22.5%" | fx2grok-bga
! align="left" width="22.5%" | fxgrok-wide

|-
| bgcolor="#6699ff" | '''Goals''' 2
|
* Small
* [https://en.wikipedia.org/wiki/Open-source_hardware Open Hardware]
* Convenient and reliable to use in practice
|
* Even smaller
* [https://en.wikipedia.org/wiki/Open-source_hardware Open Hardware]
* "Just for fun" project, doesn't have to be practical
* Sacrifices a lot of things for reduced size
|
* Smallest-possible
* [https://en.wikipedia.org/wiki/Open-source_hardware Open Hardware]
* "Just for fun" project, doesn't have to be practical
* Sacrifices even more things for reduced size
|
* Small, but 16 channels
* [https://en.wikipedia.org/wiki/Open-source_hardware Open Hardware]
* Reliable and convenient, with a few more channels

|-
| bgcolor="#6699ff" | '''Author'''
| Piotr Esden-Tempski
| Uwe Hermann
| Uwe Hermann
| Ryan "Izzy" Bales, based off of Piotr Esden-Tempski's fx2grok-flat

|-
| bgcolor="#6699ff" | '''Hardware license'''
| CC-BY-SA 4.0
| CC-BY-SA 3.0 1
| CC-BY-SA 4.0
| CC-BY-SA 4.0

|-
| bgcolor="#6699ff" | '''Size'''
| tbd
| 13mm x 13mm
| tbd
| tbd

|-
| bgcolor="#6699ff" | '''Logic channels'''
| 8
| 8
| tbd
| 16

|-
| bgcolor="#6699ff" | '''Layout specs'''
|
* Components only soldered on one side
* tbd
|
* Double-sided 2-layer PCB/layout
* Components soldered on both sides
* 0.8mm PCB thickness
* 5mil traces, 6mil trace clearance
* 8mil via drill hole diameter, 5mil annular ring
| tbd
| tbd

|-
| bgcolor="#6699ff" | '''Cypress FX2'''
| Cypress CY7C68013A-56LTXC, QFN, 8mm x 8mm
| Cypress CY7C68013A-56LTXC, QFN, 8mm x 8mm
| Cypress CY7C68013A-56BAXC, BGA, 5mm x 5mm
| Cypress CY7C68013A-56LTXC, QFN, 8mm x 8mm

|-
| bgcolor="#6699ff" | '''Input protection'''
| 100Ω on each probe, 2x DSILC6-4 for all probes, 1x USBLC6-2 for USB
| None whatsoever
| None whatsoever
| 100Ω on each probe, 4x DSILC6-4 for all probes, 1x USBLC6-2 for USB

|-
| bgcolor="#6699ff" | '''24MHz crytal'''
| tbd
| tbd
| tbd
| tbd

|-
| bgcolor="#6699ff" | '''USB connector'''
| USB Micro-B SMD
| USB Micro-B SMD
| tbd
| USB Micro-B SMD

|-
| bgcolor="#6699ff" | '''Probe connector'''
| 2x5 1.27mm PCB-edge connector
| 2x5 1.27mm PCB-edge connector
| tbd
| 2x 2x5 1.27mm PCB-edge connectors

|-
| bgcolor="#6699ff" | '''EEPROM'''
| Yes, sigrok fx2lafw (8-channel) VID/PID 1d50:608c
| None, default Cypress VID/PID 04b4:8613
| None, default Cypress VID/PID 04b4:8613
| Yes, sigrok fx2lafw (16-channel) VIP/PID 1d50:608d

|-
| bgcolor="#6699ff" | '''Passives'''
| Mostly 0402, some 0603
| Only 0402
| tbd
| Mostly 0402, some 0603

|-
| bgcolor="#6699ff" | '''LED'''
| 1x 0603 LED on PA0
| 1x 0402 LED on PA0
| tbd
| 1x 0603 LED on PA0

|}


1 Historical reasons. 
2 Optional goal: Make a tiny 3D-printed enclosure, and/or an "enclosure" using resin ([http://createdigitalmusic.com/files/stories/2006/august2006/resin_leds.jpg example]) with the device (including probes) ideally looking similar to the sigrok logo in the end. 


== What is NOT the goal? ==

As you may know, there are [[Fx2lafw#Hardware_overview|tons of FX2-based logic analyzers]] (and tons of clones) already. There's not much use in creating yet another "standard" device.

The goal of this little hobby project is thus '''NOT''' to make a '''better''' device, or to make a '''cheaper''' device, or anything like that. The only goal is to have it '''as tiny as possible''' (it's more of a "just for fun" project).

== Status ==

Work in progress, untested, may or may not work!

The first PCB, fx2grok-tiny 0.1, has been found to be '''non-working'''. A fixed 0.2 version is currently being worked on.

== Download ==

The schematics, PCB layout and Gerber files are available from the [https://sigrok.org/gitweb/?p=fx2grok.git;a=summary fx2grok] git repository:

$ '''git clone git://sigrok.org/fx2grok'''

== Photos ==

=== Schematics, PCB layout, 3D preview ===

'''fx2grok-tiny 0.1''':

<gallery>
File:Fx2grok-tiny-0.1-kicad-schematics.svg|Schematics
File:Fx2grok-tiny-0.1-kicad-layout.png|PCB layout
File:Fx2grok-tiny-0.1-kicad-3d-top.png|3D preview, top
File:Fx2grok-tiny-0.1-kicad-3d-bottom.png|3D preview, bottom
</gallery>

=== Cable and connector variants ===

'''Samtec SFSD-05-28-H-10.00-SR + TFM-105-01-L-D''':

<gallery>
File:Fx2grok samtec cable orig.jpg‎|Samtec SFSD-05-28-H-10.00-SR
File:Fx2grok samtec cable conn.jpg|Connector with notch
File:Fx2grok samtec cable crimp parts.jpg|Crimp parts
File:Fx2grok samtec cable crimp.jpg|Crimp
File:Fx2grok samtec cable finished.jpg|Finished cable
File:Fx2grok samtec cable with probes.jpg|Cable with probes
File:Fx2grok samtec cable tfm.jpg|Samtec TFM-105-01-L-D
File:Fx2grok samtec cable tfm2.jpg|Samtec TFM-105-01-L-D
File:Fx2grok_samtec_cable_connected.jpg|Cable connected
File:Fx2grok samtec cable pinheader.jpg|Cable + pinheader
</gallery>

'''Hand-soldered ribbon cable''':

<gallery>
File:Fx2grok ribbon cable orig.jpg|Ribbon cable
File:Fx2grok ribbon cable wires.jpg|Individual wires
File:Fx2grok ribbon cable soldered.jpg|Soldered connector
File:Fx2grok ribbon cable conn kapton.jpg|Kapton tape
File:Fx2grok ribbon cable finished.jpg|Finished cable
File:Fx2grok ribbon cable comparison.jpg|Cable comparison
</gallery>

=== Assembly ===

<gallery>
File:Fx2grok 0 1 pcbs.jpg|
File:Fx2grok 0 1 stencil.jpg|
File:Fx2grok 0 1 pcb top.jpg|
File:Fx2grok 0 1 pcb bottom.jpg|
File:Fx2grok 0 1 pcb on masking tape.jpg|
File:Fx2grok 0 1 pcb under stencil.jpg|
File:Fx2grok 0 1 pcb under stencil closeup.jpg|
File:Fx2grok 0 1 stencil paste preparation.jpg|
File:Fx2grok 0 1 stencil paste applied.jpg|
File:Fx2grok 0 1 pcb bottom paste.jpg|
File:Fx2grok 0 1 pcb bottom populated.jpg|
File:Fx2grok 0 1 pcb bottom soldered.jpg|
File:Fx2grok 0 1 pcb bottom kapton tape.jpg|
File:Fx2grok 0 1 pcb top paste.jpg|
File:Fx2grok 0 1 pcb top soldered.jpg|
File:Fx2grok-tiny size comparison.jpg|Size comparison
</gallery>

== Bill of materials ==

=== fx2grok-tiny 0.1 ===

'''Note:''' All prices are for single quantities, most parts get a lot cheaper if you buy higher quantities.

{| border="0" style="background-color: #eeeeee; font-size: smaller" class="alternategrey sortable sigroktable"
|- bgcolor="#6699ff"
! align="left" | Qty
! align="left" | Device
! align="left" | Footprint
! align="left" | Size
! align="left" | Value
! align="left" | Refdes
! align="left" | Digikey
! align="left" | Mouser
! align="left" | Comments

|-
| colspan="9" bgcolor="#6699cc" | Required parts

|-
|| 1 || Cypress CY7C68013A-56LTXC || QFN-56 || 8mm x 8mm || — || IC1 || [https://www.digikey.de/product-detail/en/cypress-semiconductor-corp/CY7C68013A-56LTXC/428-2933-ND/2096128?cur=EUR&lang=en 10.05€] || [http://www.mouser.de/search/ProductDetail.aspx?R=0virtualkey0virtualkeyCY7C68013A-56LTXC 10.30€] || Main chip. Alternatives:
* [http://de.futureelectronics.com/de/technologies/semiconductors/microcontrollers/8-bit/Seiten/6482053-CY7C68013A-56LTXC.aspx Future Electronics: 6.55€]
* [http://www.ebay.de/itm/1-PCS-CY7C68013A-56LFXC-QFN56-CY7C68013A-56-EZ-USB-FX2LP-USB-Microcontroller-/371990499413 eBay: 4.07€]
* [https://www.aliexpress.com/item/10PCS-Free-shipping-CY7C68013A-CY7C68013A-56LFXC-CYPRESS-NEW/32758119152.html Aliexpress: 1.52€] (10 pcs lot, 15.16€ total)

|-
|| 1 || Amphenol FCI 10118192-0001LF || custom || 9.8mm x 5.6mm || — || U1 || [https://www.digikey.de/product-detail/en/amphenol-fci/10118192-0001LF/609-4613-1-ND/2785378 0.38€] || [http://www.mouser.de/ProductDetail/FCI-Amphenol/10118192-0001LF/?qs=%2fha2pyFadujgPm4iVaIQmAH7IEAODLQazmlVAs%2fyYaruZkWE0oGmeA%3d%3d 0.35€] || USB Micro-B SMD connector

|-
|| 1 || Murata XRCGB24M000FAN00R0 || custom || 2mm x 1.6mm || 24MHz || Y1 || [https://www.digikey.de/product-detail/en/murata-electronics-north-america/XRCGB24M000FAN00R0/490-16962-1-ND/7595843 0.29€] || [http://www.mouser.de/ProductDetail/Murata/XRCGB24M000FAN00R0/?qs=%2fha2pyFaduhVXszias80rJExv6kKRiz8I6J1KIwVm7ZBhPSw4cO1NxDYBb%252bWztLR 0.46€] || 24MHz crystal

|-
|| 1 || Micrel MIC5504-3.3YM5-TR || SOT-23-5 || 2.9mm x 1.6mm || 3.3V || U2 || [https://www.digikey.de/product-detail/en/microchip-technology/MIC5504-3.3YM5-TR/576-4764-1-ND/4864028 0.10€] || [http://www.mouser.de/ProductDetail/Microchip/MIC5504-33YM5-TR/?qs=%2fha2pyFadujyBzUvhx7nCVHVS1wEK1ahUM91xHyBxIk%3d 0.10€] || 3.3V LDO

|-
|| 4 || Yageo RC0402JR-072R7L || 0402 || 0.25mm x 0.125mm || 2.7 kΩ || R2, R3, R4, R5 || [https://www.digikey.de/product-detail/en/yageo/RC0402JR-072K7L/311-2.7KJRCT-ND/729385 0.08€] || [http://www.mouser.de/ProductDetail/Yageo/RC0402JR-072K7L/?qs=%2fha2pyFadugNN0LzwXn2qKv1NucjI%2fazrntxBF%2f%2fhLo7g%252bIVZPpP%2fw%3d%3d 0.08€] || Resistor

|-
|| 1 || Samsung RC1005J104CS || 0402 || 0.25mm x 0.125mm || 100 kΩ || R1 || [https://www.digikey.de/product-detail/en/samsung-electro-mechanics-america-inc/RC1005J104CS/1276-4424-1-ND/3967396 0.08€] || — || Resistor

|-
|| 8 || Samsung CL05A104KP5NNNC || 0402 || 0.25mm x 0.125mm || 100nF || C2, C5, C7, C8, C10-C13 || [https://www.digikey.de/product-detail/en/samsung-electro-mechanics-america-inc/CL05A104KP5NNNC/1276-1022-1-ND/3889108 0.08€] || — || Ceramic capacitor

|-
|| 3 || Taiyo Yuden JMK105BJ105KV-F || 0402 || 0.25mm x 0.125mm || 1uF || C1, C14, C16 || [https://www.digikey.de/product-detail/en/taiyo-yuden/JMK105BJ105KV-F/587-1231-1-ND/931008 0.08€] || [http://www.mouser.de/ProductDetail/Taiyo-Yuden/JMK105BJ105KV-F/?qs=%2fha2pyFaduhVfLicOtMYHog0miohobAaExAZufXB%2f%252bdY5R%252bltkZq0w%3d%3d 0.10€] || Ceramic capacitor

|-
|| 2 || Murata GRM155R61A225KE95D || 0402 || 0.25mm x 0.125mm || 2.2uF || C3, C6 || [https://www.digikey.de/product-detail/en/murata-electronics-north-america/GRM155R61A225KE95D/490-10451-1-ND/5026361 0.08€] || [http://www.mouser.de/ProductDetail/Murata/GRM155R61A225KE95D/?qs=%2fha2pyFadugsr51Fgcs3VEkc4xRHZwzRUbwbh2dpjzoRDOGgmOp%2fmzl%252bsz3xq7eG 0.08€] || Ceramic capacitor

|-
|| 2 || Samsung CL05C120JB5NNNC || 0402 || 0.25mm x 0.125mm || 12pF || C4, C9 || [https://www.digikey.de/product-detail/en/samsung-electro-mechanics-america-inc/CL05C120JB5NNNC/1276-1178-1-ND/3889264 0.08 ] || — || Ceramic capacitor

|-
|| 1 || Vishay VLMB1500-GS08 || 0402 || 0.25mm x 0.125mm || — || D1 || [https://www.digikey.de/product-detail/en/vishay-semiconductor-opto-division/VLMB1500-GS08/VLMB1500-GS08CT-ND/3504671 0.34€] || [http://www.mouser.de/ProductDetail/Vishay/VLMB1500-GS08/?qs=%2fha2pyFaduhN70pSEFaWb7ncGFJYKJC0keOOL0VlVLSzC7zQ0fA2Ng%3d%3d 0.51€] || LED

|-
| colspan="9" bgcolor="#6699cc" | Optional parts / variants

|-
|| 1 || Amphenol FCI 20021111-00010T4LF || custom || — || — || P1/P2 || [https://www.digikey.de/product-detail/en/20021111-00010T4LF/609-3712-ND/2209072 0.53€] || [http://www.mouser.de/ProductDetail/FCI/20021111-00010T4LF/?qs=%2fha2pyFadug5qLbZ9z2ci%2fTjUM7AITCGO1cafk55nZhEq%252b0iFQt31y%2f99h8z8QRG 0.55€] || 5x2 through-hole pin header (1.27mm pitch), could soldered to the PCB (5 pins per side)

|-
|| 1 || Amphenol FCI 20021311-00010T4LF || custom || — || — || — || [https://www.digikey.de/product-detail/en/20021311-00010T4LF/609-3754-ND/2209079 0.68€] || [http://www.mouser.de/ProductDetail/FCI/20021311-00010T4LF/?qs=%2fha2pyFaduhY7txd7xCZHyqlTMKSj7DOXT7F8SKnNS3QPZpSMC9CyD3j5oh5%2fHMK 0.69€] || 5x2 connector/receptacle (1.27mm pitch), could be used for soldering the probe cable/wires

|-
|| 1 || Samtec TFM-105-01-L-D || custom || — || — || P1/P2 || [https://www.digikey.de/product-detail/en/samtec-inc/TFM-105-01-L-D/SAM9148-ND/6613860 0.53€] || — || 5x2 through-hole pin header (1.27mm pitch) with a notch, soldered to the PCB (5 pins per side), match for the Samtec SFSD-05-28-H-10.00-SR cable below

|-
|| 1 || Samtec SFSD-05-28-H-10.00-SR || custom || — || — || — || [https://www.digikey.de/product-detail/en/samtec-inc/SFSD-05-28-H-10.00-SR/SAM8668-ND/1785919 4.77€] || — || Potential probe cable, needs some crimping

|}

'''Note''': C15 is missing and there is a C16, which is correct. C15 was removed and the numbering wasn't reset.

== Resources ==

* [http://www.cypress.com/products/ez-usb-fx2lp Cypress FX2 overview page]
* [http://www.cypress.com/documentation/datasheets/cy7c68013a-cy7c68014a-cy7c68015a-cy7c68016a-ez-usb-fx2lp-usb CY7C68013A, CY7C68014A, CY7C68015A, CY7C68016A datasheet] ([http://www.cypress.com/file/138911/download PDF])
* [http://www.cypress.com/documentation/technical-reference-manuals/ez-usb-technical-reference-manual EZ-USB Technical Reference Manual (TRM)] ([http://www.cypress.com/file/126446/download PDF])
* [http://www.cypress.com/documentation/application-notes/an15456-guide-successful-ez-usb-fx2lp-hardware-design AN15456 - Guide to a Successful EZ-USB FX2LP Hardware Design] ([http://www.cypress.com/file/135006/download PDF])
* esden's [https://www.youtube.com/playlist?list=PLOF903IIpqjOwHIjT7VFqbxBhEHG8v5__ series of videos] on the fx2grok-flat design (schematics, PCB, with background information and almost a KiCad tutorial)
* esden's [https://github.com/esden/fx2grok/ GitHub repository] with the KiCad project files for the fx2grok-flat(In the "flat" branch)
* Ryan's [https://github.com/izzy84075/fx2grok GitHub repository] with the KiCad project files for the fx2grok-wide(In the "wide" branch)

sigrok - User contributions [en]

Fx2grok