AT89C51RC2 Atmel Corporation, AT89C51RC2 Datasheet - Page 99

• Manufacturer Part Number: AT89C51RC2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RC2

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 1.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Figure 41. Command Flow
Write/Program Commands
Description
Figure 42. Write/Program Flow
4180E–8051–10/06
COMMAND FINISHED
Wait COMMAND_OK
Sends first character of the
Frame
Sends frame (made of 2 ASCII
characters per Byte)
Echo analysis
Send Write Command
OR
Host
Host
OR
COMMAND ABORTED
COMMAND ABORTED
Wait Checksum Error
Wait Security Error
This flow is common to the following frames:
•
•
•
•
Flash/EEPROM Programming Data Frame
EOF or Atmel Frame (only Programming Atmel Frame)
Config Byte Programming Data Frame
Baud Rate Frame
’X’ & CR & LF
Write Command
’P’ & CR & LF
’.’ & CR & LF
":"
":"
Send Checksum error
Send Security error
Gets frame, and sends back ec
for each received Byte
Else
If (not received ":")
Bootloader
Sends echo and start
reception
AT89C51RB2/RC2
Bootloader
Wait Write Command
Send COMMAND_OK
Wait Programming
NO_SECURITY
Checksum error
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