PQI U172 manual USB Flash Drive, Rev. A.0, Block Diagram, Absolute Maximum Ratings

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