AT89C51AC3 Atmel Corporation, AT89C51AC3 Datasheet - Page 53

• 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

Operation Cross Memory Access
Table 18. Cross Memory Access
Note:
4383D–8051–02/08
or Code Roll
boot FLASH
External
memory
EA = 0
Over
FM0
1. RWW: Read While Write
Action
Read
Write
Read
Write
Read
Write
RAM
Space addressable in read and write are:
•
•
•
•
•
•
•
•
•
The table below provide the different kind of memory which can be accessed from differ-
ent code location.
XRAM
ERAM
RAM
ERAM (Expanded RAM access by movx)
XRAM (eXternal RAM)
EEPROM DATA
FM0 ( user flash )
Hardware byte
XROW
Boot Flash
Flash Column latch
Boot FLASH
OK
OK
-
-
-
-
OK (idle)
FM0
OK
OK
OK
-
-
(1)
E² Data
OK
OK
OK
OK
OK
OK
(1)
(1)
(1)
Hardware
Byte
OK
OK
OK
-
-
-
(1)
XROW
OK
OK
-
-
-
-
(1)
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