參數(shù)資料
型號(hào): AT89C51ID2-SLSUM
廠商: Atmel
文件頁數(shù): 27/157頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 64K 44PLCC
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 972
系列: 89C
核心處理器: 8051
芯體尺寸: 8-位
速度: 60MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲(chǔ)器容量: 64KB(64K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大?。?/td> 2K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 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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