AT89LP51RC2 Atmel Corporation, AT89LP51RC2 Datasheet - Page 199
AT89LP51RC2
Manufacturer Part Number
AT89LP51RC2
Description
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
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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
199
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