参数资料
型号: AT89C51ID2-SLSUM
厂商: Atmel
文件页数: 27/157页
文件大小: 0K
描述: IC 8051 MCU FLASH 64K 44PLCC
产品培训模块: MCU Product Line Introduction
标准包装: 972
系列: 89C
核心处理器: 8051
芯体尺寸: 8-位
速度: 60MHz
连通性: I²C,SPI,UART/USART
外围设备: POR,PWM,WDT
输入/输出数: 34
程序存储器容量: 64KB(64K x 8)
程序存储器类型: 闪存
EEPROM 大小: 2K x 8
RAM 容量: 2K x 8
电压 - 电源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 44-LCC(J 形引线)
包装: 管件
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
122
AT89C51ID2
4289C–8051–11/05
Functional Description
Figure 47. Bootloader Functional Description
On the above diagram, the on chip bootloader processes are:
ISP Communication Management
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 ...).
User Call Management
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.
Flash Memory Management
This process manages low level access to flash memory (performs read and write
access).
ISP Communication
Management
User
Application
Specific Protocol
Communication
Management
Flash
Memory
Exernal host with
Flash Memory
User Call
Management (API )
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