AT90PWM3_08 Datasheet, PDF (284/361 Pages) ATMEL Corporation – 8-bit Microcontroller with 8K Bytes In-System Programmable Flash

AT90PWM2/3/2B/3B
Table 25-9.
XA1
0
0
1
1
XA1 and XA0 Coding
XA0
Action when XTAL1 is Pulsed
0
Load Flash or EEPROM Address (High or low address byte determined by
BS1).
1
Load Data (High or Low data byte for Flash determined by BS1).
0
Load Command
1
No Action, Idle
Table 25-10. 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 25-11. No. of Words in a Page and No. of Pages in the Flash
Device
Flash Size Page Size PCWORD
No. of
Pages
AT90PWM2/2B/3/
3B
4K words
(8K bytes)
32 words
PC[4:0]
128
PCPAGE PCMSB
PC[11:5]
11
Table 25-12. No. of Words in a Page and No. of Pages in the EEPROM
Device
EEPROM
Size
Page
Size
PCWORD
No. of
Pages
PCPAGE
AT90PWM2/2B/3/
3B
512 bytes
4 bytes
EEA[1:0]
128
EEA[8:2]
EEAMSB
8
25.7 Serial Programming Pin Mapping
Table 25-13. Pin Mapping Serial Programming
Symbol
Pins
I/O
MOSI_A
PD3
I
MISO_A
PD2
O
SCK_A
PD4
I
Description
Serial Data in
Serial Data out
Serial Clock
4317I–AVR–01/08
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