USB EZ-PD™ Type-C Forum Discussions
I'm a master student and I'm writing my thesis. I'm doing a project with CCG3PA for a power bank charger ad i need a CY4531 evaluation kit to program my port controller.
I know it may be look strange but does any one know if is possible to have it for free for students or for the university?
All replies are welcome.
Thank youShow Less
We are seeing some strange behaviour on our USB-C dock, more or less based on the CCG4 dock ref-design. Sometimes (maybe every 20th time) alt-mode fails to negotiate and based on the PD-signalling it looks it is the CCG4 alt-mode state-machine that fails. There might maybe be an underlying hardware problem (maybe I2C communication to mux or something), but a bit hard to understand how the alt-mode state-machine will change behaviour based on this.
I have attached two traces. dp_alt_mode_failed the error is around line 179 were CCG4 sends NAK. In dp_alt_mode_failed_2 the error is in the last part (line 730 and below) CCG4 doesn't respond to "Enter Mode" sent from the sink. The other traces are successful attempt for comparison.
Again, this is rather random occurrences so it might well be some timing or hardware stability issue, but maybe you can come up with some clues based on what external factors the CCG4 code will act on.
Can the CCG3PA be dynamically controlled and monitored by other MCUs using I2C?
I am aware that I can do this by using the SDK to create the appropriate firmware, is that correct?
we've been using the CYPD3177 for a while. Mainly because it allows to set USB-C PD without any FW development.
The FAULT pin on the chip seems to be constantly high, although the chip is correctly providing power to the whole system (15V @1A). We're puzzled by this and haven't been able to find the root cause. We suspect there's somehow a brief OVP event at some point during startup.
We're wondering: case of a brief OVP event, does the FAULT pin get stuck high? Or does it go back to low as soon as the OVP event disappears?
The datasheet doesn't offer much detail on this.
in USB4.0 cable and active cable ref. design,which use CCG2 cypd2103 to design, I know the difference between 2103 and CMG1(2703 and 2704) is PD3.0,CC and VCONN short to VBUS protection. In ref. circuit, it add diodes to solve CYPD2103 support PD3.0, and without short protection between Vbus and CC(VCONN). The question as below: If customer need emphasis care for CC(Vconn) and Vbus protection, advise them add extra circuit, in the ref. design, it don't affect usb-if org test, so our ref. design don't add protection circuit in it.Right?
flance fangShow Less
I am checking the CCG3PA datasheet for CYPD3175-24LQXQ.
It is described below.
Termination Resistor = Rp.
Role = DFP
Since the datasheet is described "Role=DFP". Generaly, I am undrstanding that DFP(=Power Source and Data/Host side)
Q1) However, I am understanding that CYPD3175-24LQXQ can operate "Power = Power Souce" and " Data = DRD(Dual Role Data)" . Is it correct ?
I am working on a custom board using the CYPD-3171, and I am encountering issues when attempting to program, both using the PSOC-MiniProg4 part through the SWD Lines, and through the CC Programming using the CCG3PA EVK Power Board. the Hex file I am attempting to program is the generic PB application included in the SDK with a modified Config.c file as generated through the EZ-PD configuration tool. the Hex file as well as the images of each step of my attempts are attached to this post.
One error I note is that after programming over the MiniProg4 device, a subsequent verification fails as shown in VerificationFail.PNG.
In addition, when doing a CC-Program, the device claims to still be in a bootloader state even after the application is loaded.
Any assistance would be much appreciated.
Nate HinshawShow Less
in configuration table each PDOs has current limit in source code SDK i didn't find any reference
Q1: current limit how it effect on cypress CYPD3175 does the stack reading this parameters ?
Q2: CSP does has connection to current limit which update in configuration tableShow Less
Could you please provide us reference dead battery schematic ?
Becuase we have to impelement dead battery function in one of 4236 port.Show Less