2AN3WM5COREINKCoreInk

COREINK 2020 V0.01 1. OUTLINE COREINK is ESP32 board which based on ESP32-PICO-D4 module, contained 1.54-inch eINK. The board is made of PC+ABC. 1.1 Hardware Composition The hardware of COREINK: ESP32-PICO-D4 chip, eLNK, LED, Button, GROVE interface, TypeC-to-USB interface, RTC,Power Management chip battery. ESP32- PICO-D4 is a System-in-Package (SiP) module that is based on ESP32, providing complete Wi-Fi and Bluetooth functionalities. The module integrates a 4-MB SPI flash. ESP32-PICO-D4 integrates all peripheral components seamlessly, including a crystal oscillator, flash, filter capacitors and RF matching links in one single package. 1.54”E-Paper Display The display is a TFT active matrix electrophoretic display , with interface and areference system design . The 1 . 54 " active area contains 200x200 pixels , and has1- bit white / black full display capabilities . An integrated circuit contains gate buffer ,source buffer , interface , timing control logic , oscillator , DC-DC , SRAM , LUT , VCOMand border are supplied with each panel 2. PIN DESCRIPTION 2.1. USB INTERFACE COREINK Configuration Type-C type USB interface, support USB2.0 standard communication protocol. 2.2. GROVE INTERFACE 4p disposed pitch of 2.0mm COREINK GROVE interfaces, internal wiring and GND, 5V, GPIO4, GPIO13 connected. 3. FUNCTIONAL DESCRIPTION This chapter describes the ESP32-PICO-D4 various modules and functions. 3.1. CPU AND MEMORY ESP32-PICO-D4 contains two low-power Xtensa ® 32-bit LX6 MCU. On-chip memory comprising: ⚫448-KB of ROM, and the program starts for the kernel function calls ⚫For a 520 KB instruction and data storage chip SRAM (including flash memory 8 KB RTC) ⚫RTC flash memory of 8 KB SRAM, when the RTC can be started in Deep-sleep mode, and for storing data accessed by the main CPU ⚫RTC slow memory, of 8 KB SRAM, can be accessed by the coprocessor in Deep- sleep mode ⚫Of 1 kbit of eFuse, which is a 256 bit system-specific (MAC address and a chip set); the remaining 768 bit reserved for user program, these Flash program include encryption and chip ID 3.2. STORAGE DESCRIPTION 3.2.1. External Flash and SRAM ESP32 support multiple external QSPI flash and static random access memory (SRAM), having a hardware-based AES encryption to protect the user programs and data. ⚫ESP32 access external QSPI Flash and SRAM by caching. Up to 16 MB external Flash code space is mapped into the CPU, supports 8-bit, 16-bit and 32-bit access, and can execute code. ⚫Up to 8 MB external Flash and SRAM mapped to the CPU data space, support for 8-bit, 16-bit and 32-bit access. Flash supports only read operations, SRAM supports read and write operations. ESP32-PICO-D4 4 MB of integrated SPI Flash, the code can be mapped into CPU space, support for 8-bit, 16-bit and 32-bit access, and can execute code. Pin GPIO6 ESP32 of, GPIO7, GPIO8, GPIO9, GPIO10 and GPIO11 for connecting module integrated SPI Flash, not recommended for other functions. 3.3. CRYSTAL •ESP32-PICO-D4 integrates a 40 MHz crystal oscillator. 3.4. RTC MANAGEMENT AND LOW POWER CONSUMPTION ESP32 uses advanced power management techniques may be switched between different power saving modes. (See Table 5). •Power saving mode - Active Mode: RF chip is operating. Chip may receive and transmit a sounding signal. - Modem-sleep mode: CPU can run, the clock may be configured. Wi-Fi / Bluetooth baseband and RF - Light-sleep mode: CPU suspended. RTC and memory and peripherals ULP coprocessor operation. Any wake-up event (MAC, host, RTC timer or external interrupt) will wake up the chip. - Deep-sleep mode: only the RTC memory and peripherals in a working state. Wi- Fi and Bluetooth connectivity data stored in the RTC. ULP coprocessor can work. - Hibernation Mode: 8 MHz oscillator and a built-in coprocessor ULP are disabled. RTC memory to restore the power supply is cut off. Only one RTC clock timer located on the slow clock and some RTC GPIO at work. RTC RTC clock or timer can wake up from the GPIO Hibernation mode. •Deep-sleep mode - related sleep mode: power save mode switching between Active, Modem-sleep, Light-sleep mode. CPU, Wi-Fi, Bluetooth, and radio preset time interval to be awakened, to ensure connection Wi-Fi / Bluetooth. - Ultra Low-power sensor monitoring methods: the main system is Deep-sleep mode, ULP coprocessor is periodically opened or closed to measure sensor data. The sensor measures data, ULP coprocessor decide whether to wake up the main system. Functions in different power consumption modes: TABLE 5 4. ELECTRICAL CHARACTERISTICS 4.1. LIMIT PARAMETERS Table 8: Limiting values 1. V IO to the power supply pad, Refer ESP32 Technical Specification Appendix IO_MUX, as SD_CLK of Power supply for VDD_SDIO. Press and hold the side power button for two seconds to start the device.Press and hold for more than 6 seconds to turn off the device. Switch to the photo mode through the Home screen, and the avatar that can be obtained through the camera is displayed on the tft screen.The USB cable must be connected when working, and the lithium battery is used for short-term storage to prevent power failure. FCC Statement Any Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This device complies with part 15 of the 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. Note: This equipment has been tested and found to comply with the limits for a Class B digital device,pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio c…

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QA-FR-170-B Company: M5Stack Technology Co.,Ltd Add: 106,1st Floor,Building 1,Bright Techn ology Park,88 Zhuguang North Road,XiliTaoyuan Street,Nanshan District,Shenzhen,Guangdong,China Tel: 13509230623 Fax: 0755-69815195 FCC Authorization Date: 2020-09-01 FEDERAL COMMUNICATIONS COMMISSION Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Agent Authorization To whom it may concern: We, M5Stack Technology Co.,Ltd, the undersigned, Hereby authorizes Bay Area Compliance Laboratories Corporation to act on its behalf in all matters relating to application for Equipment authorization, including the signing of all documents relating to these matters. All acts carried out by Bay Area Compliance Laboratories Corp. on our behalf shall have the same effect as our own action. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 862. This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature: Typed or Printed Name: Jimmy Lai Title: CEO

Co mpany: M5Stack Technology Co.,Ltd Add: 106,1st Floor,Building 1,Bright Technology Park,88 Zhuguang North Road,XiliTaoyuan Street,Nanshan District,Shenzhen,Guangdong,China Tel: 13509230623 Fax: 0755-69815195 E-mail: [email protected] FCC Confidential Authorization Date: 2020-09-01 FEDERAL COMMUNICATIONS COMMISSIONS Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Subject: Confidentiality Request regarding application for certification of FCC ID: 2AN3WM5COREINK To : whom it may concern, In accordance with Sections 0.457 and 0.459 of the Commission’s Rules, M5Stack Technology Co.,Ltd hereby requests long-term confidential treatment of information accompanying this application as outlined below: Block Diagram Schematics Operation Description The above materials contain proprietary and confidential information not customarily released to the public. The public disclosure of these materials provides unjustified benefits to its competitors in the market. Sincerely Yours, Signature: Typed or Printed Name: Jimmy Lai Title: CEO

EXHIBIT A - EUT EXTERNAL PHOTOGRAPHS

EXHIBIT B - EUT INTERNAL PHOTOGRAPHS Wi-Fi &BLE&BT Antenna

FCC PART 15.247 TEST REPORT For M5Stack Technology Co., Ltd 106, 1st Floor, Building 1, Bright Technology Park, 88 Zhuguang North Road, Xili Taoyuan Street, Nanshan District, Shenzhen, Guangdong, China FCC ID: 2AN3WM5COREINK Report Type: Original Report Product Type: CoreInk Test Engineer: CK Huang Re port Number: RSHD200901001-00B Re port Date: 2020-09-22 Reviewed B y: Oscar Ye EMC Manager Prepared By: Bay Area Compliance Laboratories Corp. (Kunshan) No.248 Chenghu Road,Kunshan,Jiangsu province,China Tel: +86-0512-86175000 Fax: +86-0512-88934268 www.baclcorp.com.cn Bay Area Compliance Laboratories Corp. (Kunshan) Report No.: RSHD200901001-00B FCC Part 15.247 Page 2 of 75 TABLE OF CONTENTS GENERAL INFORMATION ....................................................................................................................................... 4 PRODUCT DESCRIPTION FOR EQUIPMENT UNDER TEST (EUT) ..................................................................................... 4 OBJECTIVE ................................................................................................................................................................... 4 RELATED SUBMITTAL(S)/GRANT(S) ............................................................................................................................. 4 TEST METHODOLOGY .................................................................................................................................................. 4 MEASUREMENT UNCERTAINTY .................................................................................................................................... 5 TEST FACILITY ............................................................................................................................................................. 5 SYSTEM TEST CONFIGURATION .......................................................................................................................... 6 DESCRIPTION OF TEST CONFIGURATION ...................................................................................................................... 6 EUT EXERCISE SOFTWARE .......................................................................................................................................... 6 SPECIAL ACCESSORIES ................................................................................................................................................. 6 EQUIPMENT MODIFICATIONS ....................................................................................................................................... 6 SUPPORT EQUIPMENT LIST AND DETAILS .................................................................................................................... 7 EXTERNAL I/O CABLE .................................................................................................................................................. 7 BLOCK DIAGRAM OF TEST SETUP ................................................................................................................................ 7 SUMMARY OF TEST RESULTS ............................................................................................................................... 9 TEST EQUIPMENT LIST ......................................................................................................................................... 10 FCC §1.1310 & §2.1091- MAXIMUM PERMISSIBLE EXPOSURE (MPE) ............................................................ 11 APPLICABLE STANDARD ............................................................................................................................................ 11 CALCULATED FORMULARY: ....................................................................................................................................... 11 CALCULATED DATA (WORST CASE): .......................................................................................................................... 11 FCC §15.203 – ANTENNA REQUIREMENT .......................................................................................................... 12 APPLICABLE STANDARD ............................................................................................................................................ 12 ANTENNA CONNECTOR CONSTRUCTION .................................................................................................................... 12 FCC §15.207 (a) – AC LINE CONDUCTED EMISSIONS ..................................................................................... 13 APPLICABLE STANDARD ............................................................................................................................................ 13 EUT SETUP ................................................................................................................................................................ 13 EMI TEST RECEIVER SETUP ....................................................................................................................................... 13 TEST PROCEDURE ...................................................................................................................................................... 14 FACTOR & MARGIN CALCULATION ........................................................................................................................... 14 TEST RESULTS SUMMARY .......................................................................................................................................... 14 TEST DATA ................................................................................................................................................................ 14 FCC §15.205, §15.209 & §15.247(d) – RADIATED EMISSIONS ........................................................................... 17 APPLICABLE STANDARD ...............................................................…

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EXHIBIT C - TEST SETUP PHOTOGRAPHS Conducted Emissions (Front View) Conducted Emissions (Side View) Radiated Emissions (Below 1GHz) Radiated Emissions (Above 1GHz)