AT89S8253-24PI Atmel, AT89S8253-24PI Datasheet - Page 42

• Manufacturer Part Number: AT89S8253-24PI
• Description: IC 8051 MCU FLASH 12K 40DIP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S8253-24PI

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3 bit
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Lead Free Status / Rohs Status: No RoHS Version Available

Figure 25-2. Verifying the Flash/EEPROM Memory (Parallel Mode)
PROGRAMMING
MODES TABLE
SEE FLASH
3-24 MHz
PROGRAMMING
MODES TABLE
3-24 Mhz
0000H/37FFH
SEE FLASH
0000H/37FFH
ADDR.
Fuse3 (User Row Access Fuse): This fuse enables/disables writing to the programmable user row.
Fuse4 (Clock Selection Fuse): This fuse selects between an external clock source and a quartz crystal as the clock input.
ADDR.
Programming the Flash/EEPROM Memory (Parallel Mode)
A8 - A13
A0 - A7
A8 - A13
A0 - A7
Oscillator Bypass
Fuse (Fuse4) Off
P1
P2.0 - P2.5
P3.3
P3.4
P3.5
P3.6
P3.7
XTAL2
XTAL1
GND
AT89S8253
Oscillator Bypass
Fuse (Fuse4) Off
P1
P2.0 - P2.5
P3.3
P3.4
P3.5
P3.6
P3.7
XTAL2
XTAL1
GND
AT89S8253
PSEN
P3.0
RST
ALE
V
EA
P0
PSEN
CC
RST
ALE
V
EA
P0
CC
V
CC
V
PGM DATA
(USE 10K
PULLUPS)
CC
PGM
DATA
PROG
V
RDY/BSY
(USE 10K
PULLUP)
V
PP
IH
V
V
V
I H
PP
I H
PROGRAMMING
PROGRAMMING
MODES TABLE
MODES TABLE
SEE FLASH
SEE FLASH
0000H/37FFH
0000H/37FFH
EXTERNAL
ADDR.
3-24 MHz
EXTERNAL
CLOCK
ADDR.
3-24 MHz
CLOCK
A8 - A13
A0 - A7
A8 - A13
A0 - A7
Oscillator Bypass
Fuse (Fuse4) On
P1
P2.0 - P2.5
P3.3
P3.4
P3.5
P3.6
P3.7
XTAL1
GND
Oscillator Bypass
Fuse (Fuse4) On
P1
P2.0 - P2.5
P3.3
P3.4
P3.5
P3.6
P3.7
XTAL1
GND
AT89S8253
AT89S8253
PSEN
PSEN
RST
ALE
P3.0
RST
ALE
V
EA
V
P0
EA
P0
CC
CC
V
3286P–MICRO–3/10
PGM DATA
(USE 10K
PULLUPS)
V
CC
CC
V
V
V
PGM
DATA
PROG
V
RDY/BSY
(USE 10K
PULLUP)
V
I H
PP
I H
PP
IH