AT89LS8252-12PI View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT89LS8252-12PI Datasheet PDF : 35 Pages
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AT89LS8252
Flash and EEPROM Parallel Programming Modes
Mode
Serial Prog. Modes
Chip Erase
RST
H
PSEN
h (1)
H
L
ALE/PROG
h (1)
(2)
EA/VPP
x
P2.6
P2.7
P3.6
P3.7
Data I/O
P0.7:0
12V
H
L
L
L
X
Address
P2.5:0 P1.7:0
X
Write (10K bytes) Memory
H
L
12V
L
H
H
H
DIN
ADDR
Read (10K bytes) Memory
H
L
H
12V
L
L
H
H
DOUT
ADDR
Write Lock Bits:
H
L
12V
H
L
H
L
DIN
X
Read Lock Bits:
Read Atmel Code
Read Device Code
Serial Prog. Enable
Serial Prog. Disable
Bit - 1
Bit - 2
Bit - 3
H
L
Bit - 1
Bit - 2
Bit - 3
H
L
H
L
H
L
H
L
P0.7 = 0
X
P0.6 = 0
X
P0.5 = 0
X
H
12V
H
H
L
L
DOUT
X
@P0.2
X
@P0.1
X
@P0.0
X
H
12V
L
L
L
L
DOUT
30H
H
12V
L
L
L
L
DOUT
31H
(2)
12V
L
H
L
H P0.0 = 0
X
(2)
12V
L
H
L
H P0.0 = 1
X
Read Serial Prog. Fuse
H
L
H
12V
H
H
L
H
@P0.0
X
Notes:
1. “h” = weakly pulled “High” internally.
2. Chip Erase and Serial Programming Fuse require a 10-ms PROG pulse. Chip Erase needs to be performed first before
reprogramming any byte with a content other than FFH.
3. P3.4 is pulled Low during programming to indicate RDY/BSY.
4. “X” = don’t care
21
0850C–MICRO–3/06
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