AT89C51ID2 Atmel Corporation, AT89C51ID2 Datasheet - Page 130

• Manufacturer Part Number: AT89C51ID2
• Manufacturer: Atmel Corporation

Specifications of AT89C51ID2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Sram (kbytes): 2
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Table 95. Autobaud Performances (Continued)
Command Data Stream
Protocol
Figure 52. Command Flow
4289C–8051–11/05
Frequency (MHz)
Baudrate (kHz)
4800
9600
19200
38400
57600
115200
Sends first character of the
Frame
Sends frame (made of 2 ASCII
characters per byte)
Echo analysis
Host
1.8432
OK
OK
OK
-
-
-
2
All commands are sent using the same flow. Each frame sent by the host is echoed by
the bootloader.
OK
OK
OK
-
-
-
2.4576
OK
OK
OK
OK
OK
OK
3
":"
":"
OK
OK
OK
OK
-
-
3.6864
OK
OK
OK
OK
OK
OK
4
OK
OK
OK
OK
OK
Gets frame, and sends back ec
for each received byte
-
Else
If (not received ":")
Sends echo and start
reception
Bootloader
5
OK
OK
OK
OK
OK
-
AT89C51ID2
6
OK
OK
OK
OK
OK
-
7.3728
OK
OK
OK
OK
OK
-
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