Schematics; Interfaces - Espressif Systems ESP8266 Series Hardware Design Manuallines

"
4. Remove R58 on the PCB and disconnect GPIO14 with the infrared transmitting tube;
5. Remove the pull-down resistor R29 of MTDO/IO15 (next to J11);
6. When downloading firmware, pull the IO15/CS at J11 to low level and toggle the
switch of GPIO0 inwards to enable UART Download mode;
7. When downloading is completed, release IO15/CS to enable SDIO Boot mode;
8. Connect SDIO/SPI at J5 to host for communication.

2.3. Schematics

2.3.1. Interfaces

6
GND
7
GND
8
GND
9
GND
CON8
J6
Micro USB
6
GND
7
GND
8
GND
9
GND
CON8
J7
5V&USB-UART
U0TXD
U0RXD
1.Normal:use R1 R3 R5 R7
2. Swap: use R2 R4 R6 R8
(for cancelling log print when power on )
3.Flow control: short J14 and J67
J69
CON6
!
Espressif
1
VBUS
VBUS
2
D-
3
D+
4
NC
5
GND
1
VBUS
2 R51 0R
D-
3 R46 0R
D+
4
NC
5 C9
GND
10nF
GND
GND
U0RTS R1 0R
R2 NC
R4 NC
U0TXD R3 0R
U0RXD R7 0R
R8 NC
R6 NC
U0CTS R5 0R
GND
1
2 U0TXD
3 U0RXD
4
GPIO2
5 U0CTS
6 U0RTS
Figure 2-2. ESP-LAUNCHER Interface
U5
EXT_5V
4
VCCIO
R49 0R 20
VCC
DM 16
USBDM
DP 15
USBDP
C11 C10 8
NC
19
RESET#
24
47pF 47pF
NC
27
OSCI
28 FT232RL
OSCO
GNDGND
R54
0R
17
CTS
3V3OUT
C22
0.1uF
GND
RXD
GND
TXD
J14
CON2
RTS
GPIO13
J67
CON2
GPIO15
UART
" 24 /30
2. ESP-LAUNCHER
1
TXD
5
RXD
3
RTS#
11
CTS#
2
DTR#
9
DSR#
10
DCD#
14
RI#
RED LED
D10
TX_LED
23
CUSB0
22 RX_LED
CUSB1
13
CUSB2
14
D11
CUSB3
12
CUSB4
BLUE LED
U0CTS
U0RTS
TXD
RXD
RTS
CTS
VDD33
R55 2K
R56 2K
2018.12