AT89S52-24AU Atmel, AT89S52-24AU Datasheet - Page 32

• Manufacturer Part Number: AT89S52-24AU
• Description: IC MCU 8K FLASH 24MHZ 44-TQFP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S52-24AU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: UART/USART
• Peripherals: WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Package: 44TQFP
• Device Core: 8051
• Family Name: 89S
• Maximum Speed: 24 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 32
• Interface Type: UART
• Number Of Timers: 3
• Processor Series: AT89x
• Core: 8051
• Data Ram Size: 256 B
• Maximum Clock Frequency: 24 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89ISP
• Minimum Operating Temperature: - 40 C
• No. Of I/o's: 32
• Ram Memory Size: 256Byte
• Cpu Speed: 24MHz
• No. Of Timers: 3
• Digital Ic Case Style: TQFP
• Supply Voltage Range: 4V To 5.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

31. External Data Memory Write Cycle
32. External Clock Drive Waveforms
33. External Clock Drive
32
Symbol
1/t
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
CLCL
AT89S52
0.45V
PORT 0
PORT 2
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
V
PSEN
CC
ALE
WR
- 0.5V
0.2 V
0.7 V
A0 - A7 FROM RI OR DPL
CC
t
LHLL
t
- 0.1V
AVLL
CC
t
CHCX
P2.0 - P2.7 OR A8 - A15 FROM DPH
t
AVWL
t
LLAX
t
t
QVWX
LLWL
Min
t
DATA OUT
CLCX
30
12
12
t
0
t
QVWH
t
WLWH
CLCH
t
CLCL
t
WHQX
t
A0 - A7 FROM PCL
WHLH
A8 - A15 FROM PCH
t
CHCX
Max
33
5
5
INSTR IN
t
CHCL
1919D–MICRO–6/08
Units
MHz
ns
ns
ns
ns
ns