AT89LS53 ATMEL Corporation, AT89LS53 Datasheet - Page 21

• Manufacturer Part Number: AT89LS53
• Description: 8-Bit Microcontroller with 12K Bytes Flash
• Manufacturer: ATMEL Corporation

Flash Parallel Programming Modes
Notes:
Mode
Serial Prog. Modes
Chip Erase
Write (12K bytes) Memory
Read (12K bytes) Memory
Write Lock Bits:
Read Lock Bits:
Read Atmel Code
Read Device Code
Serial Prog. Enable
Serial Prog. Disable
Read Serial Prog. Fuse
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
3. P3.4 is pulled Low during programming to indicate RDY/BSY.
4. “X” = don’t care
reprogramming any byte with a content other than FFH.
Bit - 1
Bit - 2
Bit - 3
Bit - 1
Bit - 2
Bit - 3
RST
H
H
H
H
H
H
H
H
H
H
H
PSEN
h
L
L
L
L
L
L
L
L
L
L
(1)
ALE/PROG
h
H
H
H
H
H
(1)
(2)
(2)
(2)
EA/V
12V
12V
12V
12V
12V
12V
12V
12V
12V
12V
x
PP
P2.6
H
H
H
H
L
L
L
L
L
L
P2.7
H
H
H
H
H
L
L
L
L
L
P3.6
H
H
H
L
L
L
L
L
L
L
P3.7
H
H
H
H
H
L
L
L
L
L
Data I/O
P0.7 = 0
P0.6 = 0
P0.5 = 0
P0.0 = 0
P0.0 = 1
P0.7:0
@P0.2
@P0.1
@P0.0
@P0.0
DOUT
DOUT
DOUT
DOUT
DIN
DIN
X
P2.5:0 P1.7:0
Address
ADDR
ADDR
30H
31H
X
X
X
X
X
X
X
X
X
X
X
X
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