AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 38

• 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

Program/Code
Memory
38
AT89C51AC3
The AT89C51AC3 implement 64K Bytes of on-chip program/code memory. Figure 20
shows the partitioning of internal and external program/code memory spaces depending
on the product.
The Flash memory increases EPROM and ROM functionality by in-circuit electrical era-
sure and programming. Thanks to the internal charge pump, the high voltage needed for
programming or erasing Flash cells is generated on-chip using the standard VDD volt-
age. Thus, the Flash Memory can be programmed using only one voltage and allows In-
System Programming commonly known as ISP. Hardware programming mode is also
available using specific programming tool.
Figure 20. Program/Code Memory Organization
FFFFh
0000h
64K Bytes
EA = 1
internal
Flash
FFFFh
0000h
64K Bytes
EA = 0
external
memory
4383D–8051–02/08