Model:AT91M55800-33CI BRAND:Microchip description:IC MCU 16/32BIT ROMLESS 176BGA pack:tray SERIES:AT91 status:Discontinued Core processor:ARM7? Core specifications:16/32-位 Speed:33MHz Peripherals:POR,WDT I/O number:58 Program storage capacity:- Program memory type:ROMless EEPROM capacity:- RAM size:8K x 8 Voltage - powered by:2.7V ~ 3.6V Data converter:A/D 8x10b;D/A 2x10b Oscillator type:bosom Operating temperature:-40°C ~ 85°C(TA) Type of installation:Surface mount type Encapsulation/Shell:176-LFBGA Supplier device packaging:176-BGA(13x13)