USB Flash Drive

4. Block Diagram

 

 

 

 

 

 

Program ROM

 

 

8051 Micro

 

 

 

 

Controller

Program RAM

 

 

 

 

 

 

DMA

Flash

 

 

 

 

Control

 

 

Data /

 

Logic

 

 

 

 

 

 

Address

 

 

 

 

Bus

EDC/

 

 

 

 

 

 

 

 

ECC

 

USB2.0

 

 

 

 

USB1.1

USB2.0 or

USB 2.0

 

 

Host

Interface

DATA RAM

 

1.1 Port

 

 

 

 

 

 

 

PLL, REG

CLK

 

 

 

PWR_GOOD

 

 

 

 

PWR_RST

 

Flash Memory

5. Absolute Maximum Ratings

Symbol

 

Parameter

Min

Max

Unit

Tstorage

Storage Temperature

-20

75

 

 

 

 

 

Ta

Ambient Operating Temperature

0

65

 

 

 

 

 

 

Vcc3

3.3V

Supply Voltage

-0.3

3.6

V

 

 

 

 

 

 

Vcc18

1.8V

Supply Voltage

-0.3

2

V

 

 

 

 

 

 

Vin3.3

3.3V

Buffer Input Voltage

-0.3

3.6

V

 

 

 

 

 

Vin3/5

3.3V/5V Buffer Input Voltage

-0.3

5

V

 

 

 

 

 

 

Vin1.8

1.8V

Buffer Input Voltage

-0.3

2

V

 

 

 

 

 

 

Rev. A.0

2/4

Sep 2006

Page 5
Image 5
PQI U339S Program ROM, Micro Controller Program RAM, Data Logic Address Bus, USB2.0 USB1.1, USB Host, Flash Memory

U339S specifications

The PQI U339S is a stylish and compact USB flash drive that has garnered attention for its sleek design and reliable performance. This portable storage device is designed to meet the needs of users who require efficient data transfer and storage solutions. One of the standout features of the U339S is its USB 3.1 interface, which enables high-speed data transfer rates, making it up to 10 times faster than its USB 2.0 predecessors. This significant improvement allows users to quickly transfer large files, including high-definition videos, images, and documents, without experiencing bottlenecks.

The U339S comes in multiple storage capacities, including 16GB, 32GB, 64GB, and 128GB options, providing flexibility for different storage needs. This versatility makes it an excellent choice for students, professionals, and anyone who needs to store and transport data conveniently. The drive’s slim and lightweight design means it is easy to carry around, whether in a pocket, bag, or attached to a keychain, thus ensuring that necessary files are always within reach.

One of the key characteristics of the PQI U339S is its robust build quality. The device is designed to withstand wear and tear associated with daily use. The casing is made from durable materials that offer protection against physical shocks, ensuring that your data remains safe even if the drive is accidentally dropped. Additionally, the U339S is equipped with a capless design that features a retractable connector, which not only protects the USB connector from damage but also eliminates the risk of losing a protective cap.

The PQI U339S is compatible with various operating systems, including Windows, macOS, and Linux, which increases its usability across different platforms. This makes it an ideal choice for users who work in multi-platform environments. Furthermore, it does not require any additional software or drivers for basic functions, allowing for plug-and-play compatibility.

In conclusion, the PQI U339S USB flash drive stands out with its combination of high-speed performance, durability, and stylish design. Its various storage options make it suitable for a wide range of applications, from everyday data transfer to larger file storage needs. Overall, it represents a reliable and efficient solution for anyone looking to enhance their digital storage capabilities.