AT89C51RD2-SLSIM Atmel, AT89C51RD2-SLSIM Datasheet - Page 105

• Manufacturer Part Number: AT89C51RD2-SLSIM
• Description: IC 8051 MCU FLASH 64K 44PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RD2-SLSIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• For Use With: AT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

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