2 Mbytes of SRAM Memory organized in 2 banks of 1 Mbyte (16 bit wide); Nonvolatile controller converts SRAM into non-volatile memory; On board battery holder with lithium battery (type CR2430, 285mAh); Automatically switches to battery backup supply when Vcc supply drops; Interrupt support on battery low; Battery life time 8 years typical @ +25°C; Operating temperature 0°C to +70°C