Model:AT91M42800A-33AU-999 BRAND:Microchip description:IC MCU 16/32BIT ROMLESS 144LQFP pack:tape(TR),Shear zone(CT),Digi-Reel? SERIES:AT91 status:in stock Core processor:ARM7? Core specifications:16/32-位 Speed:33MHz Peripherals:POR,WDT I/O number:54 Program storage capacity:- Program memory type:ROMless EEPROM capacity:- RAM size:8K x 8 Voltage - powered by:2.7V ~ 3.6V Data converter:- Oscillator type:外部 Operating temperature:-40°C ~ 85°C(TA) Type of installation:Surface mount type Encapsulation/Shell:144-LQFP Supplier device packaging:144-LQFP(20x20)