Yes I have, but there is no relevant information. So presumably there is no configurable parameter for this but I nevertheless need to know the delay between /CS going low and the first SCK pulse.
Search found 7 matches
- Wed Apr 20, 2022 2:46 am
- Forum: Hardware
- Topic: ESP32 SPI /CS setup time before first SCK pulse?
- Replies: 2
- Views: 2428
- Mon Apr 18, 2022 11:17 pm
- Forum: Hardware
- Topic: ESP32 SPI /CS setup time before first SCK pulse?
- Replies: 2
- Views: 2428
ESP32 SPI /CS setup time before first SCK pulse?
I am interfacing the ESP32 as an SPI master to external logic at 80 MHz. I need to know, on the ESP32's SPI master operating at 80 MHz, how much time passes between /CS going low and the first SCK rising edge? Is this parameter configurable?
Thanks for any help you can provide.
Zane
Thanks for any help you can provide.
Zane
- Sat Aug 26, 2017 6:04 pm
- Forum: Hardware
- Topic: 26MHz TCXO (not crystal) -- which pin to connect to?
- Replies: 10
- Views: 20170
Re: 26MHz TCXO (not crystal) -- which pin to connect to?
I would also like to connect a 40 MHz clock generated elsewhere in my system to the ESP32. Hassan789, I think a 1.8V signal would probably be too low. It's likely a 3.3V level. Anyway, it's difficult to say whether it should be connected to XTAL_N or XTAL_P. Other chip vendors use a naming conventio...
- Thu Jun 08, 2017 8:33 pm
- Forum: Hardware
- Topic: ESP32 GPIO slew rate/risetime
- Replies: 9
- Views: 11561
Re: ESP32 GPIO slew rate/risetime
Thanks for the info on the drive strength. That was a recent post! I shouldn't have missed it. Anyway, if nobody has any figures for the edge rates, I'll eventually measure it over all the drive strengths and with a few different capacitive loads My current design with the ESP-WROOM-32 is all quite ...
- Mon Jun 05, 2017 9:45 pm
- Forum: Hardware
- Topic: ESP32 GPIO slew rate/risetime
- Replies: 9
- Views: 11561
ESP32 GPIO slew rate/risetime
Can anyone say anything about the rise and fall times of the I/O pins on ESP32? Is there a way to adjust the slew rate or drive strength as on other MCUs?
Zane Kaminski
Zane Kaminski
- Sun Mar 12, 2017 11:44 pm
- Forum: Hardware
- Topic: Clarifications on strapping pins
- Replies: 1
- Views: 5950
Clarifications on strapping pins
The following table is included in Figure 2 in the ESP32 datasheet: Screen Shot 2017-03-12 at 5.36.52 PM.png I am not sure how to interpret this type of truth table. It it saying that both GPIO0 and GPIO2 have to be low to download the boot image? What happens when GPIO0 is low but GPIO2 is high? I ...
- Sat Jan 28, 2017 11:44 pm
- Forum: Hardware
- Topic: I2S - output main clock to codec
- Replies: 2
- Views: 7099
I2S - output main clock to codec
Hello. I have reviewed the I2S driver API found in i2s.h, but I am still not sure about one detail. I need to output the a main clock (16.9344 MHz or 18.432 MHz) to my codec chip. I figured I would synthesize it with the Audio PLL and then configure the I/O mux to output the signal, but I can't find...