ESP8266-RTOS-SDK/EN

Part: ESP8266EX from Espressif Systems

Type: Wi-Fi SoC

Key Specs:

• Deep-sleep mode power consumption: 20 μA
• Crystal oscillator frequency range: 24 MHz to 52 MHz
• Minimum operating voltage: 2.5 V
• Chip's input and output impedance: 39 + j6 Ω
• Clock amplitude range: 0.8 V ~ 1.5 V
• VDDPST voltage range: 1.8 V ~ 3.6 V
• VDDA analog power supply: 2.5 V ~ 3.6 V
• VDD3P3 PA power supply: 2.5 V ~ 3.6 V

Features:

• Wi-Fi Main Features
• Built-in Tensilica processor
• CPU, Internal Storage, and External Flash support
• High-Frequency Clock
• RF (Channel Frequencies, 2.4 GHz Receiver)
• Deep sleep wake-up
• ADC port
• HSPI, SPI, UART interfaces

Applications:

• Home appliances
• Home automation
• Smart sockets, smart lights
• Industrial wireless control
• Baby monitors
• IP cameras
• Sensor networks
• Wearable electronics
• Wireless location-aware devices
• Security ID tags
• Wireless positioning system beacons

Package:

• null

• • Home appliances
• Home automation
• Smart sockets, smart lights
• Industrial wireless control
• Baby monitors
• IP cameras
• Sensor networks
• Wearable electronics
• Wireless location-aware devices
• Security ID tags
• Wireless positioning system beacons

The pin layout is shown in Figure 2-1.

Figure 2-1. Pin Layout (Top View)

Pin definitions are shown in Table 2-1.

Table 2-1. Pin Definitions

Notes:

1. GPIO2, GPIO0, and MTDO are used to select boot mode and SDIO mode;

2. U0TXD should not be pulled low externally during power-up.

The functional block diagram of ESP8266EX is shown in Figure 3-1.

Figure 3-1. Functional Block Diagram

Table 5-1. Electrical Characteristics

Notes on CHIP_EN:

The figure below shows the power-up and reset timing diagram for ESP8266EX. The parameters are described in Table 5-2.