ATMega chip full datasheet - UCSD Department of Physics

ATmega48A/PA/88A/PA/168A/PA/328/P28.4 Calibration ByteThe ATmega48A/PA/88A/PA/168A/PA/328/P has a byte calibration value for the Internal RCOscillator. This byte resides in the high byte of address 0x000 in the signature address space.During reset, this byte is automatically written into the OSCCAL Register to ensure correct frequencyof the calibrated RC Oscillator.28.5 Page SizeTable 28-10.PartDevice IDSignature Bytes Address0x000 0x001 0x002ATmega168PA 0x1E 0x94 0x0BATmega328 0x1E 0x95 0x14ATmega328P 0x1E 0x95 0x0FTable 28-11.No. of Words in a Page and No. of Pages in the FlashDevice Flash Size Page Size PCWORDATmega48AATmega48PAATmega88AATmega88PAATmega168AATmega168PAATmega328ATmega328P2K words(4Kbytes)2K words(4Kbytes)4K words(8Kbytes)4K words(8Kbytes)8K words(16Kbytes)8K words(16Kbytes)16K words(32Kbytes)16K words(32Kbytes)No. ofPages PCPAGE PCMSB32 words PC[4:0] 64 PC[10:5] 1032 words PC[4:0] 64 PC[10:5] 1032 words PC[4:0] 128 PC[11:5] 1132 words PC[4:0] 128 PC[11:5] 1164 words PC[5:0] 128 PC[12:6] 1264 words PC[5:0] 128 PC[12:6] 1264 words PC[5:0] 256 PC[13:6] 1364 words PC[5:0] 256 PC[13:6] 13Table 28-12.DeviceNo. of Words in a Page and No. of Pages in the EEPROMEEPROMSizePageSizePCWORDNo. ofPages PCPAGE EEAMSBATmega48A 256bytes 4bytes EEA[1:0] 64 EEA[7:2] 7ATmega48PA 256bytes 4bytes EEA[1:0] 64 EEA[7:2] 7ATmega88A 512bytes 4bytes EEA[1:0] 128 EEA[8:2] 8ATmega88PA 512bytes 4bytes EEA[1:0] 128 EEA[8:2] 88271D–AVR–05/11302