Rainbow-electronics ATmega64C1 Manuel d'utilisateur télécharger pdf (Page 295)

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101

295

7647A–AVR–02/08

ATmega32/64/M1/C1

Table 24-10. XA1 and XA0 Coding

XA1 XA0 Action when XTAL1 is Pulsed

Load Flash or EEPROM Address (High or low address byte determined by

BS1).

0 1 Load Data (High or Low data byte for Flash determined by BS1).

1 0 Load Command

1 1 No Action, Idle

Table 24-11. Command Byte Bit Coding

Command Byte Command Executed

1000 0000 Chip Erase

0100 0000 Write Fuse bits

0010 0000 Write Lock bits

0001 0000 Write Flash

0001 0001 Write EEPROM

0000 1000 Read Signature Bytes and Calibration byte

0000 0100 Read Fuse and Lock bits

0000 0010 Read Flash

0000 0011 Read EEPROM

Table 24-12. No. of Words in a Page and No. of Pages in the Flash

Device Flash Size Page Size PCWORD

No. of

Pages PCPAGE PCMSB

ATmega32M1/C1

16K words

(32K bytes)

64 words

(128 bytes)

PC[5:0] 256 PC[13:6] 13

ATmega64M1/C1

32K words

(64K bytes)

128 words

(256 bytes)

PC[5:0] 256 PC[14:6] 14

Table 24-13. No. of Words in a Page and No. of Pages in the EEPROM

Device

EEPROM

Size

Page

Size PCWORD

No. of

Pages PCPAGE EEAMSB

ATmega32M1/C1 1024 bytes 4 bytes EEA[1:0] 256 EEA[9:2] 9

ATmega64M1/C1 2048 bytes 8 bytes EEA[1:0] 256 EEA[9:2] 9

1 2 ... 290 291 292 293 294 295 296 297 298 299 300 ... 365 366

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