Atmel AVR AT90S2313 User Manual

71
AT90S2313
0839G–08/01
Figure 54. Serial Programming Waveforms
Note: a = address high bits
b = address low bits
H = 0 – Low byte, 1 – High Byte
o = data out
i = data in
x = don’t care
1 = Lock bit 1
2 = Lock bit 2
Note: 1. The signature bytes are not readable in lock mode 3, i.e. both Lock bits programmed.
Table 28. Serial Programming Instruction Set
Instruction
Instruction Format
OperationByte 1 Byte 2 Byte 3 Byte4
Programming Enable
1010 1100 0101 0011 xxxx xxxx xxxx xxxx Enable serial programming while
RESET
is low.
Chip Erase
1010 1100 100x xxxx xxxx xxxx xxxx xxxx Chip erase Flash and EEPROM
memory arrays.
Read Program Memory
0010 H000 xxxx xxaa bbbb bbbb oooo oooo Read H (high or low) data o from
program memory at word address
a:b.
Write Program Memory
0100 H000 xxxx xxaa bbbb bbbb iiii iiii Write H (high or low) data i to
program memory at word address
a:b.
Read EEPROM
Memory
1010 0000 xxxx xxxx xbbb bbbb oooo oooo Read data o from EEPROM memory
at address b.
Write EEPROM
Memory
1100 0000 xxxx xxxx xbbb bbbb iiii iiii Write data i to EEPROM memory at
address b.
Write Lock Bits
1010 1100 111x x21x xxxx xxxx xxxx xxxx Write Lock bits. Set bits 1,2 = “0” to
program Lock bits.
Read Signature Bytes 0011 0000 xxxx xxxx xxxx xxbb oooo oooo Read signature byte o at address b.
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Atmel AVR AT90S2313 Specifications

General

Brand	Atmel
Model	AVR AT90S2313
Category	Microcontrollers
Language	English