參數(shù)資料
型號: AT89S2051
廠商: Atmel Corp.
英文描述: 8-bit Microcontroller with 2K/4K Bytes Flash
中文描述: 8位閃存微控制器2K/4K字節(jié)
文件頁數(shù): 14/45頁
文件大?。?/td> 981K
代理商: AT89S2051
21
3390C–MICRO–7/05
AT89S2051/S4051
Notes:
1. The internal Y-address counter is reset to 00H on the rising/falling edge of RST.
2. A positive pulse on XTAL1 loads the address data on Port P1 into the X-address (page) register and resets the Y-address.
3. A positive pulse on XTAL1 advances the Y-address counter.
4. A low pulse on P3.2 loads data from Port P1 for the current address. If another P3.2 low pulse does not arrive within 150 s,
programming starts.
5. Internally timed for 4 ms.
6. Internally timed for 2 ms.
7. 00H must be loaded into the X-address before executing this command.
8. Will read User Signature if X-address is 00H, will read Atmel Signature if X-address is 01H.
9. Fuse/Lock Bit Definitions:
10. Atmel Signature Bytes:
Table 21-2.
Parallel Programming Mode Command Summary
Mode
Test Control
Test Selects
Data I/O
P3.2
RST
INC
P3.3
P3.4
P3.5
P3.7
P1.7-0
Chip Erase
1.0 s
12V
L
H
L
XX
Load X-Address
H
12V
0.1 s
H
L
H
D
IN
Page Write
Code Memory
1.0 s
12V
0.1 s
L
H
D
IN
Page Read
Code Memory
H
12V
0.1 s
L
H
DOUT
Page Write
Sig. Row
1.0 s
12V
0.1 s
LLLL
D
IN
Page Read
Sig. Row
H
12V
0.1 s
L
H
D
OUT
Write Fuse/Lock Bit
1.0 s
12V
L
HHHH
DIN
Read Fuse/Lock Bit
H12V
L
H
L
D
OUT
Bit 7
Bit 6
Bit 5
Bit 4
Bit 1
Bit 0
XTAL Osc Bypass
User Row Programming
x2 Clock
Serial Programming
Lock Bit 2
Lock Bit 1
Enable = 0/Disable = 1
Locked = 0/Unlocked = 1
AT89S2051:
Address
00H = 1EH
01H = 23H
02H = FFH
AT89S4051:
Address
00H = 1EH
01H = 43H
02H = FFH
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