AT89C52-20QC Atmel, AT89C52-20QC Datasheet - Page 20

• Manufacturer Part Number: AT89C52-20QC
• Description: Microcontrollers (MCU) Microcontroller
• Manufacturer: Atmel

Specifications of AT89C52-20QC

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 256 B
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-44
• Minimum Operating Temperature: 0 C
• Lead Free Status / Rohs Status: No

External Data Memory Write Cycle
External Clock Drive Waveforms
External Clock Drive
20
Symbol
1/t
t
t
t
t
t
CLCL
CHCX
CLCX
CLCH
CHCL
CLCL
0.45V
PORT 0
PORT 2
PSEN
V
ALE
CC
WR
- 0.5V
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
0.2 V
A0 - A7 FROM RI OR DPL
0.7 V
AT89C52
t
CC
LHLL
t
AVLL
- 0.1V
CC
t
P2.0 - P2.7 OR A8 - A15 FROM DPH
CHCX
t
AVWL
t
LLAX
t
QVWX
t
LLWL
DATA OUT
t
t
t
QVWH
CLCX
WLWH
t
CLCH
41.6
Min
15
15
0
t
t
WHQX
CLCL
t
A0 - A7 FROM PCL
WHLH
A8 - A15 FROM PCH
t
CHCX
Max
24
20
20
INSTR IN
t
CHCL
Units
MHz
ns
ns
ns
ns
ns