PQI U250 Program ROM, Micro Controller Program RAM, Flash, Data Logic Address Bus, USB2.0 USB1.1

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