T89C51RD2-SLSIM Atmel, T89C51RD2-SLSIM Datasheet - Page 62

• Manufacturer Part Number: T89C51RD2-SLSIM
• Description: IC MICRO CTRL 64K FLASH 44PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of T89C51RD2-SLSIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

Boot Process
Figure 24. Bootloader Process
62
T89C51RD2
User Application
JUMP to 0000h
BSB=0
Yes
User Boot Loader
JUMP to FC03h
JUMP to XX00h
BSB = 00h
SBV = FCh
Condition?
BLJB = 1
Hardware
RESET
?
?
?
SBV=XXh
SBV=FCh
Yes (PSEN = 0, EA = 1,
and ALE = 1 or not connected)
Default Boot Loader
JUMP to FC00h
4243G–8051–05/03