Rainbow Electronics ATmega64C1 - Manual (Page 295)

295
7647A–AVR–02/08
ATmega32/64/M1/C1
Table 24-10. XA1 and XA0 Coding
XA1 XA0 Action when XTAL1 is Pulsed
0 0
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