AT89C51RB2-SLSIM Atmel, AT89C51RB2-SLSIM Datasheet - Page 97

• Manufacturer Part Number: AT89C51RB2-SLSIM
• Description: IC 8051 MCU FLASH 16K 44PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RB2-SLSIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.25K 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: -

Full Chip Erase
Checksum Error
Flow Description
Overview
Communication Initialization
4180E–8051–10/06
The ISP command "Full Chip Erase" erases all User Flash memory (fills with FFh) and
sets some Bytes used by the bootloader at their default values:
•
•
•
The Full Chip Erase does not affect the bootloader.
When a checksum error is detected send ‘X’ followed with CR&LF.
An initialization step must be performed after each Reset. After microcontroller reset,
the bootloader waits for an autobaud sequence ( see section ‘autobaud performance’).
When the communication is initialized the protocol depends on the record type
requested by the host.
FLIP, a software utility to implement ISP programming with a PC, is available from the
Atmel the web site.
The host initializes the communication by sending a ’U’ character to help the bootloader
to compute the baudrate (autobaud).
Figure 40. Initialization
BSB = FFh
SBV = FCh
SSB = FFh and finally erase the Software Security Bits
Communication Opened
Init Communication
Else
If (not received "U")
Host
"U"
"U"
AT89C51RB2/RC2
Sends Back ‘U’ Character
Performs Autobaud
Bootloader
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