AM6412: Schmitt Trigger inputs - characteristics

Every pin with hysteresis has a min voltage value published in the respective Electrical Characteristics table.

Regards,
Paul

Hi Paul,

i expected to find this in the electrical characteristics. I assume it is on me... here is what I was doing:

 TRM (https://www.ti.com/lit/ug/spruim2b/spruim2b.pdf) page 130:

Now I open the data sheet (https://www.ti.com/lit/ds/symlink/am6412.pdf), Ctrl-F: search for schmitt -> no results; scrolled through Electrical characterisitcs (page 130 ff) -> nothing about Schmitt-Trigger thresholds.

Without this piece of information, this feature is useless.

This sounds maybe a bit stupid, but please point me to the right place in the data sheet.

Thank you!

Christian 

Hi,

I do not think Pauls reply answers the question. And there are other pin properties like DRV_STR (driver strength) and DEBOUNCE_SEL that I did not found explained neither in the TRM nor in SPRSP56A. None of these properties can be set with the driver delivered in the mcu_plus_sdk_am64x_08_00_00_21.

Thanks & regards,

Frank

With respect to you question about drive strength, all peripheral timing was closed assuming default drive strength. Therefore, all timing parameters defined in the datasheet are only valid with the default value of drive strength. The drive strength of the default configuration is also the only configuration defined in the respective Electrical Characteristic table with the VOL, VOH, IOL, and IOH parameters.

I will need to ask about de-bounce, as this is not a parameter typically defined in the datasheet. This information would typically be discussed in the TRM.

Regards,
Paul 

I found where the de-bounce related registers are discussed in the TRM. There is a note that says de-bounce logic is not associated with all signals. It also says signals with de-bounce are defined in the datasheet. However, that is not the case.

I sent an email to the design team asking for this information. 

It may take a while for me to get this information.

I will reply again after finding something to share.

Regards,
Paul

I found which AM64x signal functions include the de-bounce function, where I have listed the signals below.

MCU_GPIO0_[21:20]
MCU_GPIO0_[17:16]
MCU_GPIO0_[13:12]
MCU_GPIO0_[6:5]
MCU_GPIO0_[1:0]

EQEP2_A
EQEP2_B
EQEP2_S
EQEP2_I

EQEP1_A
EQEP1_B
EQEP1_S
EQEP1_I

EQEP0_A
EQEP0_B
EQEP0_S
EQEP0_I

GPIO0_[87:80]
GPIO0_[78:70]
GPIO0_68
GPIO0_[44:43]

ADC_EXT_TRIGGER0
ADC_EXT_TRIGGER1

I'm still trying to find delay values associated with register settings.

Regards,
Paul