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參數(shù)資料
| 型號： | 90S1200 |
| 廠商： | Atmel Corp. |
| 元件分類： | 8位微控制器 |
| 英文描述： | -bit AVR Microcontroller with 8K Bytes In- System Programmable Flash |
| 中文描述： | 位AVR微控制器具有8K字節(jié)的系統(tǒng)內(nèi)可編程閃存 |
| 文件頁數(shù)： | 46/71頁 |
| 文件大?。?/td> | 1416K |
| 代理商： | 90S1200 |
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46
AT90S1200
0838H
–
AVR
–
03/02
Figure 35.
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
1. The signature bytes are not readable in lock mode 3 (i.e., both Lock bits programmed).
Note:
Table 19.
Serial Programming Instruction Set for AT90S1200
Instruction
Instruction Format
Operation
Byte 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 both Flash and EEPROM memory
arrays.
Read Program
Memory
0010
H
000
0000 000
a
bbbb bbbb
oooo oooo
Read
H
(high or low) byte
o
from program memory at
word address
a
:
b
.
Write Program
Memory
0100
H
000
0000 000
a
bbbb bbbb
iiii iiii
Write
H
(high or low) byte
i
to program memory at
word address
a
:
b
.
Read EEPROM
Memory
1010 0000
0000 0000
00
bb bbbb
oooo oooo
Read data
o
from EEPROM memory at address
b
.
Write EEPROM
Memory
1100 0000
0000 0000
00
bb bbbb
iiii iiii
Write data
i
to EEPROM memory at address
b
.
Write Lock Bits
1010 1100
1111 1
21
1
xxxx xxxx
xxxx xxxx
Write Lock bits. Set bits
1
,
2
=
“
0
”
to program Lock
bits.
Read Signature
Byte
0011 0000
xxxx xxxx
xxxx xx
bb
oooo oooo
Read signature byte
o
from address
b
.
(1)
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