AT89C51RC2-RLTUL Atmel, AT89C51RC2-RLTUL Datasheet - Page 92

• Manufacturer Part Number: AT89C51RC2-RLTUL
• Description: IC 8051 MCU FLASH 32K 44VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RC2-RLTUL

• 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: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 1280 B
• Interface Type: UART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Functional Description
Figure 37. Bootloader Functional Description
92
AT89C51RB2/RC2
Specific Protocol
Exernal Host with
Communication
On the above diagram, the on-chip bootloader processes are:
•
The purpose of this process is to manage the communication and its protocol between
the on-chip bootloader and a external device. The on-chip ROM implement a serial pro-
tocol (see section Bootloader Protocol). This process translate serial communication
frame (UART) into Flash memory acess (read, write, erase ...).
•
Several Application Program Interface (API) calls are available for use by an application
program to permit selective erasing and programming of Flash pages. All calls are made
through a common interface (API calls), included in the ROM bootloader. The program-
ming functions are selected by setting up the microcontroller’s registers before making a
call to a common entry point (0xFFF0). Results are returned in the registers. The pur-
pose on this process is to translate the registers values into internal Flash Memory
Management.
•
This process manages low level access to Flash memory (performs read and write
access).
ISP Communication
ISP Communication Management
User Call Management
Flash Memory Management
Management
Flash Memory
Management
Flash
Memory
Management (API )
User Call
Application
User
4180E–8051–10/06