Here We Go: Release 1st Sept.

WiFive
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Here We Go: Release 1st Sept.

Postby WiFive » Sat Aug 20, 2016 8:16 pm

https://mobile.twitter.com/EspressifSys ... 2214535168
Release 1st Sept.
Things are happening! Not sure exactly what "release" means, maybe first chips shipping, add to taobao store?

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rudi ;-)
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Re: Here We Go: Release 1st Sept.

Postby rudi ;-) » Sat Aug 20, 2016 10:35 pm

txs!
..what we do without you..
txs!

240 ( 220 ? ) MHz CPU clock - fine

one think over: ESP32-wRover ( think he mean wifi Rover ) :mrgreen:
does John Lee mean with "4 MByte of SRAM" the extern possible from a SRAM over (h)SPI ? or mistake and 4 MBit ?
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WiFive
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Re: Here We Go: Release 1st Sept.

Postby WiFive » Sat Aug 20, 2016 10:44 pm

rudi ;-) wrote: does John Lee mean with "4 MByte of SRAM" the extern possible from a SRAM over (h)SPI ? or mistake and 4 MBit ?
Yes I think so, external ram. Flash and SRAM can both be used with cache.

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rudi ;-)
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Re: Here We Go: Release 1st Sept.

Postby rudi ;-) » Sat Aug 20, 2016 10:55 pm

WiFive wrote:
rudi ;-) wrote: does John Lee mean with "4 MByte of SRAM" the extern possible from a SRAM over (h)SPI ? or mistake and 4 MBit ?
Yes I think so, external ram. Flash and SRAM can both be used with cache.
have thinked so,too. txs for confirm. i was little unsure what he mean.

nice 'accelerator's datasheet :) - one thing is not on the list just in time - hope for the 'CAN' Controller implant
think we need for receive/send datatelegram one extern transceiver like MCP2551 or the TJA1050..
what you mean about the 'CAN' Controller implant ?
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nicolaswzk
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Re: Here We Go: Release 1st Sept.

Postby nicolaswzk » Sat Aug 20, 2016 11:23 pm

good news
Where to go on sale?

:lol: :lol: :lol:

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rudi ;-)
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Re: Here We Go: Release 1st Sept.

Postby rudi ;-) » Sun Aug 21, 2016 1:46 am

nicolaswzk wrote:good news
Where to go on sale?
hi
option 1
option 2

best wishes
rudi ;-)
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rudi ;-)
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Re: Here We Go: Release 1st Sept.

Postby rudi ;-) » Sun Aug 21, 2016 2:10 am

we have 3x I2C in the ESP32 release?
( beta was/is 2xI2C )
before wrote: 3 x UARTs, including hardware flow control
3 x SPI
2 x I2S
12 x ADC input channels
2 x DAC
2 x I2C <<<<<<<<<<<<<<<<<<<<<<<<<<<<<
PWM/timer input/output availabe on every GPIO pin
OpenOCD debug interface with 32 kB TRAX buffer
SDIO master/slave 50 MHz
Supports external SPI flash up to 16 MB
SD-card interface support
in datasheet 2x I2C too
i2c-esp32.png
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wide supply volt range operation changed
before wrote: 2.2V to 3.6V operating voltage
to
before wrote: 2.0 to to 3.6V operating voltage

SRAM changed
before wrote: Integrated 520 KB SRAM
to
before wrote: 512 kByte SRAM

and DMIPS changed
before wrote: 600 DMIPS
to
John Lee on Twitter wrote: "link twitter"
..What will you do with 650 DMIPS? *drum roll*..
We have 650 DMIPS? :shock:

fine!
:mrgreen:
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WiFive
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Re: Here We Go: Release 1st Sept.

Postby WiFive » Sun Aug 21, 2016 4:00 am

rudi ;-) wrote:
WiFive wrote:
rudi ;-) wrote: does John Lee mean with "4 MByte of SRAM" the extern possible from a SRAM over (h)SPI ? or mistake and 4 MBit ?
Yes I think so, external ram. Flash and SRAM can both be used with cache.
have thinked so,too. txs for confirm. i was little unsure what he mean.
Now where can we find 32mbit serial SRAM??

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rudi ;-)
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Re: Here We Go: Release 1st Sept.

Postby rudi ;-) » Sun Aug 21, 2016 8:22 am

WiFive wrote:
rudi ;-) wrote:
WiFive wrote:
Yes I think so, external ram. Flash and SRAM can both be used with cache.
have thinked so,too. txs for confirm. i was little unsure what he mean.
Now where can we find 32mbit serial SRAM??

i think we do this from spi slave contected SPI Flash :idea:

have a look: CY62177EV30LL-55ZXI ( parallel )
SRAM 32Mb 3V 55ns 2M x 16 LP SRAM

option 2

- Micro SD cards are serial interface and only need a couple of control lines.

- You can always bit-bang a parallel bus. To safe pins you could use 74xx595 shift registers to make the address lines

- Option 3

-Option 4
Last edited by rudi ;-) on Sun Aug 21, 2016 8:33 am, edited 3 times in total.
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johnlee
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Re: Here We Go: Release 1st Sept.

Postby johnlee » Sun Aug 21, 2016 8:25 am

about the supply voltage range. the main issue is not with ESP32, but with the flash chips which usually runs off 3.3V, with the exception of some vendors which went as low as 2.2V. with ESP32, we decided to try using 1.8V flash; hence we can now go to 2.0V.

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