You are here

TetraHub during RESET | Cypress Semiconductor

Support & Community

TetraHub during RESET

Last Updated: June 15, 2011

What happens on resetting the TetraHub using the RESET# pin? Does the TetraHub re-enumerate? What states are the I/O pins? What state are the SPI_CS, SPI_SD and SPI_SCK in during reset? Is the EEPROM queried again on a reset?


This RESET# pin will reset the entire chip. Everything is reset on RESET#. TetraHub will actually be in an unaddressed, unconfigured state, waiting for a USB bus reset and enumeration. For the states of the IOs, note that most of the resets in the chip are synchronous. So, at power-up, before the clock is running, they really can be unknown. Towards the end of reset, the SPI_SCK should be driving, SPI_SD not. SPI_CS# will be driving as well. The EEPROM is reread.

Knowledge Base Tags: 

Provide feedback on this article

Browse KB By Product

Browse KB by Type