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STM6600 Implementation Queries

gowthaman_d
Associate

‎2025-08-04 9:45 PM - last edited on ‎2025-08-05 3:45 AM by

Hi,

We are implementing STM6600 push button controller for our design and we have below queries.

 

  1. Is there any pull up connected to PS hold pin, can I connect this directly to 3.3V logic MCU.
  2. For variant STM6600DU25DM6F, tON blank is 11.2s, Do we need to hold PB button for 11.2 for power EN deassertion, or if we set PShold to high within 1 or 2seconds, power on will be successful.

 

Regards,

Gowthaman

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Peter BENSCH
ST Employee

‎2025-08-05 3:40 AM - edited ‎2025-08-05 3:42 AM

Welcome @gowthaman_d, to the community!

  1. PShold has no internal pull-up, but a pull-down that is active during startup. You can connect it directly to 3.3V, if VCC has the same value (see data sheet, table 3, Input voltages on ... PShold).

  2. For ton_blank, see the data sheet, section 3, Power-on: On the STM6600 the PSHOLD signal has to be set high prior to push-button release and tON_BLANK expiration, otherwise the enable signal is deasserted [...]

Does it answer your questions?

Regards
/Peter

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