Rainbow-electronics ATmega8515L Manual de usuario descargar pdf (Pagina 179)

179

ATmega8515(L)

2512A–AVR–04/02

Table 86. Pin Values used to Enter Programming Mode

Pin Symbol Value

PAGEL Prog_enable[3] 0

XA1 Prog_enable[2] 0

XA0 Prog_enable[1] 0

BS1Prog_enable[0] 0

Table 87. XA1 andXA0 Coding

XA1 XA0 Action when XTAL1 is Pulsed

00LoadFlash orEEPROM Address (High orlow address byte determinedbyBS1)

01LoadData (High orLowdata byte forFlash determinedbyBS1)

10LoadCommand

11NoAction,Idle

Table 88. CommandByte Bit Coding

Command Byte Command Executed

1000 0000 ChipErase

0100 0000 Write Fuse Bits

0010 0000 Write Lock Bits

0001 0000 Write Flash

0001 0001 Write EEPROM

0000 1000 ReadSignature Bytes andCalibration byte

0000 0100 ReadFuseandLock Bits

0000 0010 ReadFlash

0000 0011 ReadEEPROM

Table 89. No. ofWords in a Page andNo. of Pages in the Flash

Flash Size Page Size PCWORD No. of Pages PCPAGE PCMSB

4Kwords (8Kbytes) 32 words PC[4:0] 128 PC[11:5] 11

Table 90. No. ofWords in a Page andNo. of Pages in the EEPROM

EEPROM Size Page Size PCWORD No. of Pages PCPAGE EEAMSB

512 bytes 4 bytesEEA[1:0] 128 EEA[8:2] 8

1 2 ... 174 175 176 177 178 179 180 181 182 183 184 ... 222 223

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Rainbow-electronics ATmega8515L Manual de usuario Pagina 179