USB Low-Full-High Speed Peripherals

Hi

Does the CY7C65215A Linux API provide a method for i2c stuck bus recovery?  i.e. if a device connected to the master is holding the SDA line low can the CY7C65215A clock out the slave device so that it releases SDA?

Thanks

Mal

Hello,

I would like clarification on certain comments made in this post:

https://community.cypress.com/t5/USB-Low-Full-High-Speed/cy7c65215-jtag-pin-types-and-connections/m-p/110083

#1: Are pullups/pulldowns REQUIRED on the JTAG pins, or just SUGGESTED? If required, please confirm which pins get pullups/pulldowns.

#2: @YatheeshD_36 makes the comment: "Once SCB 1 is configured as JTAG the other interface in CY7C65215 cannot be used." This is NOT my understanding. I thought the restriction was that SCB 0 and SCB 1 could not be used concurrently. Please clarify, as this will severely affect my design.

#3: (unrelated to the referenced post): In the datasheet, revision M (https://www.cypress.com/file/129956/download) table 17 shows that SCB1 Mode 7 (JTAG) has TDO as pin 5, and TDI as pin 6. In prior versions, these two were swapped. Please also confirm that revision M is correct.

Thank you.

I have a project with the CY7C68014A that I am having difficulties getting the device to boot correctly.  When the PC sees the device it says that the Device Descriptors Failed.  When I checked the clock I noted that it was not working so I replaced it.  When I hold reset# low clock will return the device is recognized by the computer as being there but fails the Device Descriptors.  If I could get some help about what conditions need to happen prior to enumeration it would be great.  Best I can tell 3.3V comes up, Oscillator stabilizes at 24Mhz then Reset# is released.  At some point I know that the device will look for the EEPROM on the I2C Bus for firmware.

Our product based on cy7c68013a.

Most of them are Normally operating well. But some product did not be recognized about 2~3 times out of 10.

Power source, reset timing, i2c clk, data lines were good. However,there was someting very strange about i2c data voltage abnormal.

There was no pull up, or data transaction, but voltage level about 1.4v with pull down sometimes.(our voltage level 3.3v)

I haven't seen this symptom. Would you tell me how to debug this symptom? Wold you tell me how to solve this problem?

Hi,

We’ve got a realtime GPIF-based application, and we would really appreciate clarification on one point.

Does the flow state test the transaction counter?  Our waveform deliberately never enters the IDLE state, and yet it is stopping anyways when the TCB reaches zero.  How is this possible?

Thank you,

-Peter Iannucci

Hi.! Can I use my CY7C68013A development board as a USB to I2C adapter  to modify old printer chip eeproms? I have some replacement .bin files I need to flash onto the old chips. If anyone knows how to and which software can be used I would really appreciate it :P.

best regards,

Henrik

hello

i'm using CY7C65213 in parallel with TI battery charger, without programming issues with "usb serial utility" the CY7 makes conflict with the BQ battery charger, that normally detect automatically the charger type.  If i do a programming of the CY7C65213 , enabling BCD, then all is solved. i would like to use the chip without "USB programming " in mass production of my boards.  How to do?   is there a way of do such programming issues trough attached MCU(attached to cy7c65213)  instead of USB host ?

thanks!