ESP8266 Community Forum

Posted: **Sun Sep 14, 2014 10:50 pm**

I am trying to make heads and tails of the docs online.... I have a layout and these connections?

Do you see any wrong?

Do you see any 100% correct?

connections to 8266
1 vdda +3.3V
2 lna antenna
3 vddp3 +3.3V
4 vddp3 +3.3V
5 vdd_rtc nothing
6 tout nothing
7 chip_en nothing
8 xpd_dcdc resistor to +3.3V, will pull to zero with external I/O. to power down
9 MTMS nothing
10 mtdi nothing
11 vddpst +3.3V
12 mtck cathode of an LED
13 mtdo cathode of an LED
14 gpio2 cathode of an LED
15 grio0 to a chip select of seria SRAM
16 VDD nothing
17 vddpst +3.3V
18 sd2 nhold of flash
19 sd1 nwp of flash
20 sdcmd chip select of serial flash
21 sdclk clock of serial flash
22 sd0 miso of serial flash
23 sd1 mosi of serial flash
24 dvdd nothing
25 rxd txd of my uC device
26 txd rxd of my uC device
27 xtalo xtal
28 xtali xtal
29 vdd +3.3V
30 vdda +3.3V
31 12K to 12K resistor to ground (can this be 10K)
32 rstb resistor to +3.3V will pull to zero with external I/O to hold in reset
33 to ground (big center pad)
8+32 are connected together and help in reset and powerdown at same time?

Thanks a million in advance!

Posted: **Mon Sep 15, 2014 1:16 am**

Bringing out the jtag connection might be useful, too.

Pin6 probably offers an adc channel. Worth considering.

Posted: **Mon Sep 15, 2014 5:37 am**

Pin 19 is SD3, not SD1.

Posted: **Mon Sep 15, 2014 7:51 am**

Is pin 7 chip-en connected to nothing?

ESP8266 Community Forum

Do you think these connections are good?

Do you think these connections are good?

Re: Do you think these connections are good?

Re: Do you think these connections are good?

Re: Do you think these connections are good?