at89ls52-16si ATMEL Corporation, at89ls52-16si Datasheet - Page 24

• Manufacturer Part Number: at89ls52-16si
• Description: At89ls52, Low-voltage Microcontroller With 8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

20. Programming Interface – Parallel Mode
Every code byte in the Flash array can be programmed by using the appropriate combination of control signals. The write
operation cycle is self-timed and once initiated, will automatically time itself to completion.
Most major worldwide programming vendors offer worldwide support for the Atmel microcontroller series. Please contact
your local programming vendor for the appropriate software revision.
Table 20-1.
Notes:
24
Mode
Write Code Data
Read Code Data
Write Lock Bit 1
Write Lock Bit 2
Write Lock Bit 3
Read Lock Bits
1, 2, 3
Chip Erase
Read Atmel ID
Read Device ID
Read Device ID
1. Each PROG pulse is 200 ns - 500 ns for Chip Erase.
2. Each PROG pulse is 200 ns - 500 ns for Write Code Data.
3. Each PROG pulse is 200 ns - 500 ns for Write Lock Bits.
4. RDY/BSY signal is output on P3.0 during programming.
5. X = don’t care.
AT89LS52
Flash Programming Modes
V
5V
5V
5V
5V
5V
5V
5V
5V
5V
5V
CC
RST
H
H
H
H
H
H
H
H
H
H
PSEN
L
L
L
L
L
L
L
L
L
L
PROG
ALE/
H
H
H
H
H
(2)
(3)
(3)
(3)
(1)
EA/
V
12V
12V
12V
12V
12V
H
H
H
H
H
PP
P2.6
H
H
H
H
H
L
L
L
L
L
P2.7
H
H
H
H
L
L
L
L
L
L
P3.3
H
H
H
H
H
L
L
L
L
L
P3.6
H
H
H
H
H
L
L
L
L
L
P3.7
H
H
H
L
L
L
L
L
L
L
P0.7-0
Data
P0.2,
P0.3,
D
P0.4
1EH
62H
06H
D
OUT
X
X
X
X
IN
P2.4-0
X 0000
X 0001
X 0010
A12-8
A12-8
2601B–MICRO–03/05
X
X
X
X
X
Address
P1.7-0
A7-0
A7-0
00H
00H
00H
X
X
X
X
X