AT89C51ED2 Atmel Corporation, AT89C51ED2 Datasheet - Page 105
AT89C51ED2
Manufacturer Part Number
AT89C51ED2
Description
Manufacturer
Atmel Corporation
Specifications of AT89C51ED2
Flash (kbytes)
64 Kbytes
Max. Operating Frequency
60 MHz
Cpu
8051-12C
Max I/o Pins
32
Spi
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT89C51ED2
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT89C51ED2-3CSIM
Manufacturer:
ATMEL
Quantity:
77 760
Company:
Part Number:
AT89C51ED2-IM
Manufacturer:
ATMEL
Quantity:
116
Company:
Part Number:
AT89C51ED2-IM(QFP-64)
Manufacturer:
ATMEL
Quantity:
458
Company:
Part Number:
AT89C51ED2-RDTUM
Manufacturer:
ATMEL
Quantity:
19 090
Part Number:
AT89C51ED2-RDTUM
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Company:
Part Number:
AT89C51ED2-RLTUM
Manufacturer:
ATMEL
Quantity:
13 400
Part Number:
AT89C51ED2-RLTUM
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
24.9.4
Figure 24-8. Command Flow
4235K–8051–05/08
Command Data Stream Protocol
Sends First Character of the
Frame
Sends Frame (made of 2 ASCII
Characters Per Byte)
Echo Analysis
Host
Table 24-8.
All commands are sent using the same flow. Each frame sent by the host is echoed by the
bootloader.
Frequency
(MHz)
Baudrate (kHz)
4800
9600
19200
38400
57600
115200
Frequency
(MHz)
Baudrate (kHz)
2400
4800
9600
19200
38400
57600
115200
Autobaud Performances (Continued)
1.8432
OK
OK
OK
OK
OK
OK
OK
8
-
-
-
-
-
-
OK
OK
OK
OK
10
2
-
-
-
-
-
-
-
-
-
":"
":"
11.0592
2.4576
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
-
OK
OK
OK
OK
OK
OK
OK
OK
12
3
-
-
-
-
3.6864
14.746
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Gets Frame, and Sends Back Echo
for Each Received Byte
-
Else
If (not received ":")
Sends Echo and Start
Reception
AT89C51RD2/ED2
Bootloader
OK
OK
OK
OK
OK
OK
OK
OK
16
4
-
-
-
-
-
OK
OK
OK
OK
OK
OK
OK
OK
OK
20
5
-
-
-
-
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
24
6
-
-
-
7.3728
26.6
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
105