Cold Chain Data Logger

The cold chain data logger reference design can measure and record temperature information and automatically generate a PDF data log. Furthermore, it provides three additional functions: a touch-key control system, LCD information including temperature/ battery level/ time, and an embedded BC1.2 standard for a smart charger.

Features

-	Saves BOM cost and simplifies PCB layout
	- Three-in-one MCU: system control, LCD display control, and touch key control
	- LCD controller built-in DH1/DH2 capacitance
	- Crystal-less USB 2.0 FS
-	PDF data log file automatically via USB device
	Minimal PDF library (Optimized only 39 KB of Flash and 10 KB of RAM)
-	USB Smart Charger
	- Battery Charge Standard 1.2
-	GUI tool on PC synchronize device status
	- Synchronize RTC and warning log data with Nuvoton Logger

Specifications

M258 (32-bit Arm® Cortex®-M23)
-	Touch key controller
	- IEC 61000-4-6 10 Vrms
	- High touch sensitivity and high-noise immunity
-	LCD controller
	- Charge pump voltage range from 2.8 V to 5.2 V
	- Display remain in power down mode

System Block Diagram

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Cold Chain Data Logger

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