概要信息：

2 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
 
 
 
 
 
 
 
 
 
 
URL  
 
Wi-Fi Wi-Fi  
 
 
                                                                                                            
3 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
 
1  5 
2  6 
3  7 
4  8 
5  9 
5.1        9 
6 ESP8266  10 
7  11 
7.1        11 
7.2       12 
8 CPU  13 
8.1       CPU 13 
8.2        13 
8.3       AHB  AHB  13 
8.4        14 
8.4.1       SI/SPI  14 
8.4.2        IO 15 
8.4.3       IO  15 
9  17 
9.1        17 
10  19 
11  20 
11.1      20 
11.2       21 
                                                                                                            
4 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
12  22 
12.1       22 
12.2      2.4GHZ  22 
12.3      2.4GHZ  23 
12.4       23 
     QFN32  24 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                                                                            
5 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
1  
ESCP SOC
WiFi  
ba
lu
n
SRAM
CPU
MAC
SDIO
SPI
GPIO
I2C
VCO 1/2
 
1 ESP8266  
 
 
 
 
 
 
 
                                                                                                            
6 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
2  
ESP8266 Wi-Fi
Wi-Fi  
ESP8266
 
Wi-Fi
SPI/SDIO AHB
 
ESP8266  GPIO 
ESP8266
balun
PCB  
ESP8266 VoIP /
 / /DDR/LVDS/LCD  
 
 
 
 
                                                                                                            
7 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
3   
 802.11 b/g/n 
 Wi-Fi Direct (P2P) soft-AP 
 TCP/IP  
 TR balun LNA  
 PLL  
 802.11b +19.5dBm  
  
  
 10uA 
 32 CPU  
 SDIO 2.0  SPI UART 
 STBC 1x1 MIMO 2x1 MIMO 
 A-MPDU A-MSDU  0.4 s  
 2ms  
 1.0mW (DTIM3) 
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
  
 
8 
| P
a
g
e
   
   
   
  
   
   
   
   
   
   
   
 
20
13
12
09
  
E
S
P
8
2
6
6
 8
0
2
.1
1
b
g
n
 
 
4 
 
                                                                                                            
9 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
5  
ESP8266
 
ESP8266
12uA
1.0mW(DTIM=3) 0.5mW(DTIM=10)  
watchdog
ESP8266  
ESP8266 ESP8266
SOC SOC Wi-
Fi  
ESP8266
PA  
5.1        
ESP8266 TR RF 
balun +25dBm PA ESP8266 BOM
 
ESP8266 BOM  
                                                                                                            
10 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
6  ESP8266  
  
  
  
  
  
  
  
  
  
 ID  
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                                                                            
11 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
7  
7.1        
3.3V 25 C  
[1] SAW  
[2]  90%  
     
802.11b, CCK 1Mbps, POUT=+19.5dBm  215  mA 
802.11b, CCK 11Mbps, POUT=+18.5dBm  197  mA 
802.11g, OFDM 54Mbps, POUT 
=+16dBm 
 145  mA 
 802.11n, MCS7, POUT =+14dBm  135  mA 
 802.11b,  1024 , -80dBm  60  mA 
802.11g,  1024 , -70dBm  60  mA 
802.11n,  1024 , -65dBm  62  mA 
  0.9  mA 
  10  uA 
DTIM 1  1.2  mA 
DTIM 3  0.86  mA 
  0.5  uA 
 
 
                                                                                                            
12 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
7.2       
3.3V 1.1V  
     
 2412  2484 MHz 
  50   
   -10 dB 
72.2Mbps PA  14 15 16 dBm 
11b PA  17.5 18.5 19.5 dBm 
     
CCK, 1Mbps  -98  dBm 
CCK, 11Mbps  -91  dBm 
6Mbps (1/2 BPSK)  -93  dBm 
54Mbps (3/4 64-QAM)  -75  dBm 
HT20, MCS7 (65Mbps, 72.2Mbps)  -71  dBm 
     
OFDM, 6Mbps  37  dB 
OFDM, 54Mbps  21  dB 
HT20, MCS0  37  dB 
HT20, MCS7  20  dB 
 
 
 
 
                                                                                                            
13 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
8 CPU  
8.1       CPU  
32 CPU 16
CPU  
 RAM/ROM (iBus) 
 RAM (dBus) 
 AHB  
 JTAG  
8.2        
ROM SRAM CPU iBus dBus AHB
ROM RAM
 
8.3       AHB  AHB  
AHB MAC SDIO CPU AHB
AHB  
 APB  
  
APB
 
APB ESP8266
APB SI/SPI SDIO GPIO UART
(RTC) MAC  
                                                                                                            
14 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
8.4        
ESP 8266   
8.4.1       SI/SPI  
SI EEPROM
I2C/SPI I2C 2  
SPI
GPIO  
SPI CODEC
SPI  
 SPI_EN0 
 SPI_EN1 
 SPI_EN2 
SPI SPI SPI  
SPI_EN0 / MIB
MIB
 
SPI_EN1 codec ADC
 
SPI_EN2 EEPROM individual data MIB
MAC
 
                                                                                                            
15 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
 
                                                                                 2: SPI  
8.4.2        IO 
16 GPIO GPIO
/  CPU
sigma-delta PWM DAC  
UART SI  
8.4.3       IO  
IO
IO
 
IO IO 
 
5uA  
                                                                                                            
16 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
     
 VIL -0.3 0.25 VIO V 
 VIH 0.75 VIO 3.6 V 
 IIL  50 nA 
 VOL  0.1 VIO V 
 VOH 0.8 VIO  V 
 Cpad  2 pF 
VDDIO VIO 1.7 3.6 V 
 IMAX  12 mA 
 Tamb -20 100 C 
 
IO snap back circuit
snap back 6V 5.8V
ESD  
                                                                                                            
17 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
9   
ROM SRAM SDIO
 
802.11 b/g/n/e/i WLAN MAC Wi-Fi Direct
(DCF) BSS Wi-Fi P2P
P2P P2P group operation ESP8266
 
 RTS/CTS 
  
  
  
 802.11h/RFC 1042  
 /  
 P2P WiFi direct 
P2P
 
9.1         
 
 802.11 b/g/n/d/e/i/k/r  
 Wi-Fi Direct (P2P)  
 P2P P2P Group Owner mode P2P  
  (Infrastructure BSS)  (Station) /P2P /SoftAP
 
  
o CCMP (CBC-MAC, ) 
                                                                                                            
18 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
o TKIP (MIC, RC4) 
o WAPI (SMS4) 
o WEP (RC4)  
o CRC 
 WPA/WPA2 WPS  
 802.11i : 
o  
o TSN 
 EAP : 
o TLS 
o PEAP 
o LEAP 
o SIM 
o AKA 
o  
 802.11n (2.4GHz / 5GHz) 
 MIMO 1 1 and 2 1 STBC A-MPDU A-MSDU  0.4 s  
 WMM U-APSD 
 QoS 802.11e  
 UMA UMA  
 802.1h/RFC1042  
 DMA CPU  
  
 / 802.11  
           
 SNR Tx  
            
 MAC  
  
  
              
  /  WiFi /   
 
                                                                                                            
19 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
10  
  
 OFF CHIP_PD
RTC
 
 DEEP_SLEEP RTC
RTC recovery memory
WiFi  
 SLEEP RTC
MAC RTC
 
 WAKEUP
PWR
PLL
 
 ON
CPU
WAITI CPU
 
Off
On
Deep Sleep
Sleep
XTAL Off
WAKEUP
events
SLEEP criteria
XTAL_SETTLE
CHIP_PWD
Wakeup
~CHIP_PWD
                                                                                                            
20 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
11  
11.1      
ESP8266 Tx Rx
26MHz 52MHz  
wifi
 
 
     
 FXO 26 52 MHz 
 CL  32 pF 
 CM 2 5 pF 
 RS 0 65  
 FXO -15 15 ppm 
vs  (-25 C ~ 75 C) FXO,Temp -15 15 ppm 
 
 
 
 
 
                                                                                                            
21 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
11.2       
26MHz 52MHz
 
 
     
 VXO 0.2 1 Vpp 
 FXO,EXT -15 15 ppm 
@1kHz , 40MHz    -120 dBc/Hz 
@10kHz , 40MHz    -130 dBc/Hz 
@100kHz , 40MHz    -138 dBc/Hz 
                                                                                                            
22 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
12  
ESP8266  
 2.4GHz  
 2.4GHz  
  
  
  
  
12.1       
IEEE802.11bgn RF  
  (MHz)   (MHz) 
1 2412 8 2447 
2 2417 9 2452 
3 2422 10 2457 
4 2427 11 2462 
5 2432 12 2467 
6 2437 13 2472 
7 2442 14 2484 
12.2      2.4GHz  
2.4GHz RF 2 ADC
RF
AGC DC  
 
                                                                                                            
23 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
12.3      2.4GHz  
2.4 GHz 2.4GHz CMOS
802.11b
+19dBm 802.11n +16dBm  
  
  
 I/Q  
  
 
12.4       
2.4GHz
 
  
  
  
 
 
 
 
 
 
                                                                                                            
24 | P a g e                                  2013 12 09   
ESP8266 802.11bgn  
     QFN32