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Home/Questions/Q 2646
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vikas Nagpal
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vikas Nagpal
Asked: September 15, 20222022-09-15T12:27:20+05:30 2022-09-15T12:27:20+05:30In: Wireless Connectivity

ESP32-S3 DDR SPI?

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Looking at the ESP32- S3 datasheet section 3.5.2 Serial supplemental Interface( SPI), in the SPI2 General­purpose SPI( GP­SPI) mode part it’s mentioned that SPI2 can do DDR at 40Mhz while in half duplex mode.

In the design i’ve a SPI slave chip that does DDR on the MISO line, as in MISO line needs to be sampled at both edges of the SCLK line. It’s not a flash/ ram chip, so I need to drive the SPI2 in the general purpose mode.

I wanted to confirm that this is what the datasheet says, but looking at API docs for ESP- IDF for ESP32- S3 only talks about SPI DDR for external flash modules.

Can someone clarify, can I use SPI2 in general purpose master mode with half duplex, to sample the MISO line on both edges of SCLK?

ddrESP-IDFesp32esp32-s3spi2
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    1. nidhi singh
      2022-09-23T13:20:25+05:30Added an answer on September 23, 2022 at 1:20 pm

      It does have a DDR feature, but I do not think this point is in the driver yet. Can you share what chip you are trying to communicate with? I can tell the driver team what to focus on if I file an issue to apply this.

      It does have a DDR feature, but I do not think this point is in the driver yet. Can you share what chip you are trying to communicate with? I can tell the driver team what to focus on if I file an issue to apply this.

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