Ai-thinker technology Esp-12k User manual

ESP-12K Specification V1.0

ESP-12K SPECIFICATION

Version V1.0

ESP-12K Specification V1.0

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The information in this article, including the URL for reference, is subject to change

without notice.

The document is provided "as is" without any guarantee responsibility, including any

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does not grant any license to use intellectual property rights, whether express or

implied, by estoppel or other means.

The test data obtained in this article are all obtained by Enxin Lab's laboratory tests,

and the actual results may be slightly different.

The Wi-Fi Alliance member logo is owned by the Wi-Fi Alliance.

All trademark names, trademarks and registered trademarks mentioned in this article

are the property of their respective owners and are hereby declared.

The final interpretation right belongs to Shenzhen Anxinke Technology Co., Ltd.

Notice

The contents of this manual may change due to product version upgrade or other

reasons. Shenzhen Anxinke Technology Co., Ltd. reserves the right to modify the

contents of this manual without any notice or prompt. This manual is only used as a

guide. Shenzhen Anxinke Technology Co., Ltd. makes every effort to provide accurate

information in this manual, but Shenzhen Anxinke Technology Co., Ltd. does not

guarantee that the contents of the manual are completely error-free. And the

suggestion does not constitute any express or implied guarantee.

ESP-12K Specification V1.0

III

Formulation / Revision / Abolition of CV

Version

Date

Formulation / Revision

Make

Verify

V1.0

2020.04.10

First formulated

Yiji Xie

ESP-12K Specification V1.0

CONTENT

1.PRODUCT DESCRIPTION.......................................................................................................................... V

2.ELECTRICAL PARAMETER....................................................................................................................... IX

3.DIMENSION...................................................................................................................................................XI

4.PIN DEFINITION.......................................................................................................................................... XII

5.SCHEMATIC DIAGRAM............................................................................................................................. XV

6.DESIGN GUIDE.......................................................................................................................................... XVI

7.PACKAGING................................................................................................................................................XIX

8.CONTACT US..............................................................................................................................................XIX

ESP-12K Specification V1.0

1.PRODUCT DESCRIPTION

ESP-12K is a Wi-Fi module developed by Ensink Technology. The core processor

ESP32-S2 of this module is a highly integrated low-power Wi-Fi system-on-chip (SoC)

designed for the Internet of Things (IoT) , Mobile devices, wearable electronic devices,

smart home and other applications. ESP32-S2 has industry-leading low-power

performance and RF performance, supports IEEE802.11b / g / n protocol, integrates

Wi-Fi MAC, Wi-Fi RF and baseband, RF switch, RF Balun, power amplifier, low noise

Amplifier, etc.

The ESP32-S2 chip is equipped with Xtensa® 32-bit LX7 single-core processor, and its

operating frequency is up to 240 MHz. The chip supports secondary development

without the use of other microcontrollers or processors. The chip has 320 KB SRAM

and 128 KB ROM, and can be connected to flash and RAM through SPI / QSPI / OSPI

and other interfaces. ESP32-S2 supports a variety of low-power operating states to

meet the power consumption requirements of various application scenarios. The

unique fine clock gating function, dynamic voltage clock frequency adjustment function,

and RF output power adjustable function of the chip can achieve the best balance

between communication distance, communication rate and power consumption.

ESP32-S2 provides a wealth of peripheral interfaces, including SPI, I2S, UART, I2C,

LED PWM, LCD interface, Camera interface, ADC, DAC, touch sensor, temperature

sensor and up to 43 GPIO.It supports the expansion of PSRAM on the periphery of the

chip, and the ESP-12K module can be equipped with PSRAM. In addition, it includes a

full-speed USB On-The-Go (OTG) interface that can support the use of USB

communication.

ESP32-S2 has a variety of unique hardware security mechanisms. The hardware

encryption accelerator supports AES, SHA, and RSA algorithms. The RNG, HMAC and

Digital Signature (Digital Signature) modules provide more security features. Other

security features include flash encryption and secure boot (se-cure boot) signature

verification. The perfect security mechanism enables the chip to be perfectly applied to

various encryption products.

ESP-12K Specification V1.0

Features

Complete 802.11b / g / n Wi-Fi SoC module, data rate up to 150Mbps

Built-in ESP32-S2 chip, Xtensa® single-core 32-bit LX7 microprocessor, support

up to 240 MHz clock frequency, with 128KB ROM, 320KB SRAM, 16KB RTC

SRAM

Support UART / GPIO / ADC / PWM / SPI / I2C / LCD / I2S / Camera / IR / USB /

DAC interface, support touch sensor, temperature sensor, pulse counter

SMD-42 packaging

Integrate Wi-Fi MAC/ BB/RF/PA/LNA

Support multiple sleep modes, deep sleep current is less than10uA

Serial port speed up to4Mbps

ESP-12K Specification V1.0

VII

Built-in Lwip protocol stack

Support STA/AP/STA+AP work mode

Smart Config (APP) / AirKiss (WeChat) one-click distribution network supporting

Android and IOS

Support serial local upgrade and remote firmware upgrade (FOTA)

General AT command can be used quickly

Support secondary development, integrated Windows, Linux development

environment

About PSRAM:

ESP-12K supports optional PSRAM, the default 2 kinds of PSRAM configuration,

the shield can be distinguished on the silk screen. For details, please refer to the

product appearance drawing.

ESP-12K(00) without PSRAM

ESP-12K(08) configuration 8MByte PSRAM

Main parameter

List 1 Main parameter

Model Name

ESP-12K

Packaging

SMD-42

Size

31.0*18.0*3.0(±0.2)MM

Antenna

PCB antenna/IPEX connector

Spectrum range

2400 ~ 2483.5MHz

Work

Temperature

-40 ℃~ 85 ℃

Storage

environment

-40 ℃~ 125 ℃, < 90%RH

Power Supply

Range

Voltage 3.0V ~ 3.6V，Current >500mA

ESP-12K Specification V1.0

VIII

Interface

UART/GPIO/ADC/PWM/SPI/I2C/LCD/I2S/Camera/IR/USB/DA

IO port qty

Serial rate

Support 110 ~ 4608000 bps ，default 115200 bps

Safety

WEP/WPA-PSK/WPA2-PSK

SPI Flash

Default 32Mbit

PSRAM

Optional without PSRAM or 8MByte PSRAM

ESP-12K Specification V1.0

2.ELECTRICAL PARAMETER

RF performance

Description

Typical

Unit

Work frequency

2400 - 2483.5

MHz

Output power

In 11n mode HT40，PA output

power is

12±2

dBm

In 11n mode HT20，PA output

power is

13±2

dBm

In 11g mode，PA output power is

14±2

dBm

In 11b mode，PA output power is

16±2

dBm

Receive sensitivity

CCK, 1 Mbps

＜＝-96

dBm

CCK, 11 Mbps

＜＝-88

dBm

6 Mbps (1/2 BPSK)

＜＝-91

dBm

54 Mbps (3/4 64-QAM)

＜＝-74

dBm

HT20 (MCS7)

＜＝-71

dBm

HT40 (MCS7)

＜＝-68

dBm

Parameter

Condition

Min

Typical

Max

Unit

Voltage

VDD

3.0

3.3

3.6

I/O

VIL/VIH

-0.3/0.75VIO

0.25VIO/3.6

VOL/VOH

N/0.8VIO

0.1VIO/N

IMAX

ESP-12K Specification V1.0

Power consumption

The following power consumption data is based on a 3.3V power supply, an ambient

temperature of 25 ° C, and is measured using an internal voltage regulator.

All measurements are done at the antenna interface without SAW filters.

All transmission data is based on a 90% duty cycle, measured in

continuous transmission mode.

Mode

Mix

Typical

Max

Unit

Send 802.11b, CCK 11Mbps,

POUT=+17dBm

190

Send 802.11g, OFDM 54Mbps,

POUT =+15dBm

145

Send 802.11n, MCS7, POUT

=+13dBm

120

Receive 802.11b,package length

1024bit, -80dBm

Receive 802.11g, package length

1024, -70dBm

Receive 802.11n,package length

1024bit, -65dBm

Modem-Sleep①

Light-Sleep②

1.4

Deep-Sleep③

μA

Power Off

0.5

μA

ESP-12K Specification V1.0

3.DIMENSION

ESP-12K（00）

ESP-12K（08）

ESP-12K Specification V1.0

XII

4.PIN DEFINITION

The ESP-12K module has a total of 42 interfaces, such as the pin diagram, the pin

function definition table is the interface definition

ESP-12K PIN definition diagram

List PIN function definition

No.

item

Function Description

GND

ground

VCC

Power supply

IO0

RTC_GPIO0, GPIO0

IO1

RTC_GPIO1, GPIO1, TOUCH1, ADC1_CH0

IO2

RTC_GPIO2, GPIO2, TOUCH2, ADC1_CH1

IO3

RTC_GPIO3, GPIO3, TOUCH3, ADC1_CH2

IO4

RTC_GPIO4, GPIO4, TOUCH4, ADC1_CH3

IO5

RTC_GPIO5, GPIO5, TOUCH5, ADC1_CH4

IO6

RTC_GPIO6, GPIO6, TOUCH6, ADC1_CH5

ESP-12K Specification V1.0

XIII

IO7

RTC_GPIO7, GPIO7, TOUCH7, ADC1_CH6

IO8

RTC_GPIO8, GPIO8, TOUCH8, ADC1_CH7

IO9

RTC_GPIO9, GPIO9, TOUCH9, ADC1_CH8, FSPIHD

IO10

RTC_GPIO10, GPIO10, TOUCH10, ADC1_CH9,

FSPICS0, FSPIIO4

IO11

RTC_GPIO11, GPIO11, TOUCH11, ADC2_CH0, FSPID,

FSPIIO5

IO12

RTC_GPIO12, GPIO12, TOUCH12, ADC2_CH1,

FSPICLK, FSPIIO6

IO13

RTC_GPIO13, GPIO13, TOUCH13, ADC2_CH2, FSPIQ,

FSPIIO7

IO14

RTC_GPIO14, GPIO14, TOUCH14, ADC2_CH3, FSPIWP,

FSPIDQS

IO15

RTC_GPIO15, GPIO15, U0RTS, ADC2_CH4,

XTAL_32K_P

IO16

RTC_GPIO16, GPIO16, U0CTS, ADC2_CH5,

XTAL_32K_N

IO17

RTC_GPIO17, GPIO17, U1TXD, ADC2_CH6, DAC_1

IO18

RTC_GPIO18, GPIO18, U1RXD, ADC2_CH7, DAC_2,

CLK_OUT3

IO19

RTC_GPIO19, GPIO19, U1RTS, ADC2_CH8, CLK_OUT2,

USB_D-

IO20

RTC_GPIO20, GPIO20, U1CTS, ADC2_CH9, CLK_OUT1,

USB_D+

IO21

RTC_GPIO21, GPIO21

IO26

SPICS1, GPIO26

GND

接地

IO33

SPIIO4, GPIO33, FSPIHD

IO34

SPIIO5, GPIO34, FSPICS0

IO35

SPIIO6, GPIO35, FSPID

IO36

SPIIO7, GPIO36, FSPICLK

IO37

SPIDQS, GPIO37, FSPIQ

IO38

GPIO38, FSPIWP

ESP-12K Specification V1.0

XIV

IO39

MTCK, GPIO39, CLK_OUT3

IO40

MTDO, GPIO40, CLK_OUT2

IO41

MTDI, GPIO41, CLK_OUT1

IO42

MTMS, GPIO42

U0TX

U0TXD, GPIO43, CLK_OUT1

U0RX

U0RXD, GPIO44, CLK_OUT2

IO45

GPIO45

IO46

GPIO46

High level: chip enable;

Low level: the chip is off;

Has been raised by default.

GND

Ground

List Module startup mode description

System startup mode

Default

SPI startup mode

Download startup

mode

IO0

Pull up

IO46

Pull down

Irrelevant

Note: Some pins have been pulled up internally, please refer to the schematic

ESP-12K Specification V1.0

5.SCHEMATIC DIAGRAM

ESP-12K Specification V1.0

XVI

6.DESIGN GUIDE

1、Application circuit

note:

(1) The RC delay circuit needs to be added to the EN pin. It is recommended that

R = 10kΩ and C = 0.1μF;

(2) GPIO18 as U1RXD needs to add a pull-up resistor externally.

2、Antenna layout requirements

(1) The following two methods are recommended for the installation location on

the motherboard:

Option 1: Place the module on the edge of the main board, and the antenna area

protrudes from the edge of the main board.

Option 2: Place the module on the edge of the motherboard, and the edge of the

motherboard digs out an area at the position of the antenna.

(2) In order to meet the performance of the onboard antenna, it is forbidden to

place metal parts around the antenna, away from high-frequency devices.

ESP-12K Specification V1.0

XVII

3、Power supply

(1) 3.3V voltage is recommended, the peak current is more than 500mA

(2) It is recommended to use LDO for power supply; if using DC-DC, it is recommended

to control the ripple within 30mV.

(3) It is recommended to reserve the position of the dynamic response capacitor in the

DC-DC power supply circuit, which can optimize the output ripple when the load

changes greatly.

(4), 3.3V power interface is recommended to add ESD

devices.

4、Use of GPIO port

(1) Some GPIO ports are led out of the periphery of the module. If you need to use a

10-100 ohm resistor in series with the IO port. This can suppress overshoot, and the

level on both sides is more stable. Helps both EMI and ESD.

(2) For the up and down of the special IO port, please refer to the instruction manual of

the specification, which will affect the startup configuration of the module.

(3) The IO port of the module is 3.3V. If the IO level of the main control and the module

does not match, a level conversion circuit needs to be added.

(4) If the IO port is directly connected to the peripheral interface, or the pin header and

other terminals, it is recommended to reserve ESD devices near the terminal of the IO

trace.

ESP-12K Specification V1.0

XVIII

Pic Level shift circuit

ESP-12K Specification V1.0

XIX

7.PACKAGING

As shown below, the packaging of ESP-12K is taping.

8.CONTACT US

Website：https://www.ai-thinker.com

Development DOCS：https://docs.ai-thinker.com

Official forum：http://bbs.ai-thinker.com

Sample purchase：https://aithinker.onesite.alibaba.com/

Business：sales@aithinker.com

Technical support：support@aithinker.com

Add：408-410, Block C, Huafeng Smart Innovation Port, Gushu 2nd Road, Xixiang, Baoan District, Shenzhen

Tel：0755-29162996

Integration instructions for host product manufacturers according to KDB 996369 D03 OEM Manual v01

2.2 List of applicable FCC rules

The ESP-12K is an Wi-Fi Module with digitally modulated systems using an DSSS with DBPSK/DQPSK/CCK for

802.11b; OFDM with BPSK/QPSK/16QAM/64QAM for 802.11g/n; modulation. It operates on the 2400-2483.5MHz

band and, therefore, is within U.S. FCC part 15.247 standard

2.3 Specific operational use conditions

The EUT is a Wi-Fi Module

Operation Frequency: 2412-2462MHz for 802.11b/g/11n(HT20); 2422-2452MHz for 802.11n(HT40);

Modulation Type: DSSS with DBPSK/DQPSK/CCK for 802.11b;

OFDM with BPSK/QPSK/16QAM/64QAM for 802.11g/n;

Number Of Channel: 11 channels for 802.11b/g/11n(HT20); 7 channels for 802.11n(HT40);

Antenna Designation: PCB Antenna

Antenna Gain: 3.0dBi

ESP-12K is a Wi-Fi module developed by Ensink Technology. The core processor ESP32-S2 of this module is a

highly integrated low-power Wi-Fi system-on-chip (SoC) designed for the Internet of Things (IoT) , Mobile devices,

wearable electronic devices, smart home and other applications. ESP32-S2 has industry-leading low-power

performance and RF performance, supports IEEE802.11b / g / n protocol, integrates Wi-Fi MAC, Wi-Fi RF and

baseband, RF switch, RF Balun, power amplifier, low noise Amplifier, etc.

2.4 Limited module procedures

not applicable; Single Modular Approval Request

2.5 Trace antenna designs

Not applicable;

2.6 RF exposure considerations

To maintain compliance with FCC’s RF Exposure guidelines, This equipment should be installed and

operated with minimum distance between 20cm the radiator your body: Use only the supplied antenna.

2.7 Antennas

The ESP-12Kis an Wi-Fi Module beams signals and communicates with its antenna, which is PCB

Antenna. The PCB Antenna gain is 3.0dBi. Antenna could not be in no-load state when module is

working. During debugging, it is suggested to add 50 ohms load to the antenna port to avoid damage

or performance degradation of the module under long-time no-load condition.

2.8 Label and compliance information

The final end product must be label in a visible area with the following

Host must Contains FCC ID: 2ATPO-ESP-12K. If the size of the end product is larger than 8x10cm, then

the following FCC part 15.19 statement has to also be available on the label: This device complies

with Part 15 of FCC rules. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference and

(2) this device must accept any interference received, including interference that may cause undesired operation.

2.9 Information on test modes and additional testing requirements

Data transfer module demo board can control the EUT work in RF test mode at specified test channel.

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