Data Sheet

ESP8266
3.3V
GND
GND
GND GND
3.3V3.3V
3.3V
GND
3.3V
GND
AT25SF041-SOIC8
GND
3.3V
GND
GNDGND
GND
3.3V
GND
3.3V
3.3V
VDDA
1
LNA
2
VDD3P3
3
VDD3P3
4
VDD_RTC
5
TOUT/ADC
6
CHIP_EN
7
XPD_DCDC/GPIO16
8
MTMS/SPICLK/GPIO14
9
MTDI/SPIQ/GPIO12
10
VDDPST
11
MTCK/SPID/GPIO13
12
MTDO/SPICS/GPIO15
13
GPIO2
14
SPICS2/GPIO0
15
GPIO4
16
VDDPST
17
SPIHD/SD_DATA_2
18
SPIWP/SD_DATA_3
19
SPICS0/SD_CMD
20
SPICLK/SD_CLK
21
SPIQ/SD_DATA_0
22
SPID/SD_DATA_1
23
GPIO5
24
U0RXD
25
U0TXD
26
XTAL_OUT
27
XTAL_IN
28
VDDD
29
VDDA
30
RES12K
31
EXT_RSTB
32
GND
EP
U2
CS
1
SO(D1)
2
WP(D2)
3
GND
4
SI(D0)
5
SCK
6
HOLD(D3)
7
VCC
8
U3
1
2
DTR
RXI
TXO
VCC
CTS
GND
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