The Waveshare 7.5-inch NFC e-Paper Eval Kit is a cutting-edge display solution that combines the benefits of e-paper technology with NFC functionality. It allows users to refresh the display content wirelessly using an NFC-enabled smartphone or an NFC reader. The kit includes a versatile NFC board with an ST25R3911B NFC chip, an AT32F413RBT7 controller, and a range of interfaces and features for easy integration and development.
How It Works
To refresh the display content, use a smartphone with NFC function or an NFC reader. Simply bring the device close to the e-paper for both wireless powering and data transfer.
Key Components

ST25R3911B: NFC chip, also known as AS3911B.
AT32F413RBT7: Controller with the following specifications:

Core: ARM® 32-bit Cortex™-M4F
Operating Frequency: 200MHz
Operating Voltage: 2.0V-3.6V
Package: LQFP64
Memories: 128kB Flash, 32kB SRAM
Communication Interfaces: 2 x SPI, 5 x USART, 2 x I2C, 2 x CAN, 1 x USB, 1 x SDIO
AD & DA Converters: 2 x AD (12-bit, shares 16 channels)

23LC1024: SRAM, 1Mbit
CP2102: USB TO UART converter, for debugging
SPX3819: 3.3V voltage regulator

Additional Features

1.3″ OLED: Blue display, 128×64 pixels, SH1106 driver
4x User Buttons
2x User Indicators
MCU Unused Pins
USB TO UART Port
Micro SD Slot
SWD Programming Interface
NFC Induction Coil

UART Pin Configuration

RXD: Connected to RXD2 by default, changeable to RXD1 via 0Ω resistor
TXD: Connected to TXD2 by default, changeable to TXD1 via 0Ω resistor

Specifications of Waveshare 7.5-inch NFC e-Paper Eval Kit

Operating Voltage: 3.3V / 5V
Display Color: ACeP 7-Color
Resolution: 600×448 pixels
Grey Scale: 2
Interface: 3-wire SPI, 4-wire SPI
Viewing Angle: >170°
Partial Refresh Time: N/A
Full Refresh Time: <35s
Outline Dimensions: 128 × 101.5mm
Display Size: 114.9 × 85.8mm
Refresh Power: 50mW (typical)
Standby Current: <0.01uA (almost none)
Dot Pitch: 0.1915 × 0.1915mm

Manufacture of Waveshare 7.5-inch NFC e-Paper Eval Kit
 
7.5inch NFC-Powered e-Paper Evaluation Kit, Wireless Powering & Data Transfer
 
http://www.waveshare.com/wiki/7.5inch_NFC-Powered_e-Paper