Datasheet ESP8266EX (Espressif) - 9
| 制造商 | Espressif |
| 描述 | With the complete and self-contained Wi-Fi networking capabilities, ESP8266EX can perform either as a standalone application or as the slave to a host MCU |
| 页数 / 页 | 27 / 9 — Pin Definitions |
| 修订版 | 1.0 |
| 文件格式/大小 | PDF / 602 Kb |
| 文件语言 | 英语 |
Pin Definitions
文件文字版本
2. Pin Definitions !
2. Pin Definitions
Figure 2-1 shows the pin layout for 32-pin QFN package. ! Figure 2-1. Pin Layout Table 2-1 lists the definitions and functions of each pin. Table 2-1. ESP8266EX Pin Definitions Pin Name Type Function 1 VDDA P Analog Power 3.0 V ~ 3.6 V RF Antenna Interface. Chip Output Impedance=50 Ω 2 LNA I/O No matching required. It is suggested to retain the π-type matching network to match the antenna. 3 VDD3P3 P Amplifier Power 3.0 V ~ 3.6 V 4 VDD3P3 P Amplifier Power 3.0 V ~ 3.6 V 5 VDD_RTC P NC (1.1 V) ADC pin. It can be used to test the power-supply voltage of VDD3P3 (Pin3 and Pin4) and the input power voltage of TOUT 6 TOUT I (Pin 6). However, these two functions cannot be used simultaneously. Chip Enable 7 CHIP_PU I High: On, chip works properly Low: Off, small current consumed Deep-sleep wakeup (need to be connected to EXT_RSTB); 8 XPD_DCDC I/O GPIO16 Espressif ! / 5 !23 2016.04
2. Pin Definitions
Figure 2-1 shows the pin layout for 32-pin QFN package. ! Figure 2-1. Pin Layout Table 2-1 lists the definitions and functions of each pin. Table 2-1. ESP8266EX Pin Definitions Pin Name Type Function 1 VDDA P Analog Power 3.0 V ~ 3.6 V RF Antenna Interface. Chip Output Impedance=50 Ω 2 LNA I/O No matching required. It is suggested to retain the π-type matching network to match the antenna. 3 VDD3P3 P Amplifier Power 3.0 V ~ 3.6 V 4 VDD3P3 P Amplifier Power 3.0 V ~ 3.6 V 5 VDD_RTC P NC (1.1 V) ADC pin. It can be used to test the power-supply voltage of VDD3P3 (Pin3 and Pin4) and the input power voltage of TOUT 6 TOUT I (Pin 6). However, these two functions cannot be used simultaneously. Chip Enable 7 CHIP_PU I High: On, chip works properly Low: Off, small current consumed Deep-sleep wakeup (need to be connected to EXT_RSTB); 8 XPD_DCDC I/O GPIO16 Espressif ! / 5 !23 2016.04