AT89LP51RC2 Atmel Corporation, AT89LP51RC2 Datasheet - Page 199

• Manufacturer Part Number: AT89LP51RC2
• Manufacturer: Atmel Corporation

Specifications of AT89LP51RC2

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 42
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 7
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 1.375
• Self Program Memory: API
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 4
• Isp: SPI/OCD/UART
• Watchdog: Yes

24.5
Figure 24-6. Diagram Context Description
3722A–MICRO–10/11
Bootloader
Access Via
Specific
Protocol
Access From
User
Application
The Bootloader is a ROM-based application that provides the following features:
The bootloader manages communication according to a specifically defined protocol to provide
the whole access and service on Flash memory. Furthermore, all accesses and routines can be
called from the user application.
Table 24-12
Table 24-12. Bootload Definitions
On
Mnemonic
BSB
HW/HSB
SBV
SSB
• Flash Internal Program Memory
• Boot vector allows user provided Flash loader code to reside anywhere in the Flash memory
• Default loader in Boot ROM allows programming via the serial port without the need of a user
• Programming and erasing voltage with standard power supply
• Read/Programming/Erase:
• Typical programming time (64K bytes) is 22s with on chip serial bootloader
• Programmable security for the code in the Flash
• 100K write cycles
• 10 years data retention
space. This configuration provides flexibility to the user.
provided loader.
Figure
– Byte-wise read without wait state
– Byte or page erase and programming (10 ms)
24-7, the on-chip bootloader processes are:
list some acronyms used by the Bootloader.
Definition
Boot Status Byte
Hardware Byte/Hardware Security Byte
Software Boot Vector
Software Security Byte
Bootloader
AT89LP51RB2/RC2/IC2 Preliminary
Flash Memory
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