AT89S8252-24PI Atmel, AT89S8252-24PI Datasheet - Page 27

• Manufacturer Part Number: AT89S8252-24PI
• Description: MCU W/SPI 8KB FLSH 2K EEP 40-DIP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S8252-24PI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: AT89S825224PI

Flash and EEPROM Parallel Programming Modes
Notes:
0401G–MICRO–3/06
Mode
Serial Prog. Modes
Chip Erase
Write (10K bytes) Memory
Read (10K 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
AT89S8252
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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