AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 126

• Manufacturer Part Number: AT89C51AC3
• Manufacturer: Atmel Corporation

Specifications of AT89C51AC3

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 62.5
• Sram (kbytes): 2.25
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

External Program Memory Read Cycle
126
AT89C51AC3
PORT 0
PORT 2
PSEN
ALE
INSTR IN
OR SFR-P2
ADDRESS
T
Table 75. AC Parameters for a Variable Clock
LHLL
T
T
LLAX
AVLL
A0-A7
Symbol
T
T
T
T
T
T
T
T
T
T
T
PLPH
PLAZ
LHLL
AVLL
LLAX
LLPL
PXIX
AVIV
LLIV
PLIV
PXIZ
T
AVIV
ADDRESS A8-A15
T
LLIV
T
LLPL
TPLAZ
T
PLIV
T
PLPH
Type
INSTR IN
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
T
PXIX
12 T
CLCL
Standard
Clock
2 T - x
4 T - x
3 T - x
3 T - x
5 T - x
T
T - x
T - x
T - x
T - x
PXIZ
x
x
T
PXAV
A0-A7
X2 Clock
0.5 T - x
0.5 T - x
0.5 T - x
1.5 T - x
1.5 T - x
0.5 T - x
2.5 T - x
2 T - x
T - x
x
x
ADDRESS A8-A15
X parameter
INSTR IN
10
15
15
30
10
20
40
40
10
0
7
4383D–8051–02/08
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns