參數(shù)資料
型號: AT89C51ID2-SLRUM
廠商: Atmel
文件頁數(shù): 20/157頁
文件大?。?/td> 0K
描述: IC 8051 MCU 64K FLASH 44-PLCC
產(chǎn)品培訓模塊: MCU Product Line Introduction
標準包裝: 500
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
外圍設備: POR,PWM,WDT
輸入/輸出數(shù): 34
程序存儲器容量: 64KB(64K x 8)
程序存儲器類型: 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: 標準包裝
其它名稱: AT89C51ID2-SLRUMDKR
116
AT89C51ID2
4289C–8051–11/05
Flash Memory
The Flash memory increases EPROM and ROM functionality with in-circuit electrical
erasure and programming. It contains 64K bytes of program memory organized respec-
tively in 512 pages of 128 bytes. This memory is both parallel and serial In-System
Programmable (ISP). ISP allows devices to alter their own program memory in the
actual end product under software control. A default serial loader (bootloader) program
allows ISP of the Flash.
The programming does not require external dedicated programming voltage. The nec-
essary high programming voltage is generated on-chip using the standard V
CC pins of
the microcontroller.
Features
Flash internal program memory.
Boot vector allows user provided Flash loader code to reside anywhere in the Flash
memory space. This configuration provides flexibility to the user.
Default loader in Boot ROM allows programming via the serial port without the need
of a user provided loader.
Up to 64K byte external program memory if the internal program memory is disabled
(EA = 0).
Programming and erase voltage with standard power supply.
Read/Programming/Erase:
Byte-wise read without wait state
Byte or page erase and programming (10 ms)
Typical programming time (64K bytes) is 22s with on chip serial bootloader
Parallel programming with 87C51 compatible hardware interface to programmer
Programmable security for the code in the Flash
100k write cycles
10 years data retention
Flash Programming and
Erasure
The 64K bytes Flash is programmed by bytes or by pages of 128 bytes. It is not neces-
sary to erase a byte or a page before programming. The programming of a byte or a
page includes a self erase before programming.
There are three methods of programming the Flash memory:
First, the on-chip ISP bootloader may be invoked which will use low level routines to
program the pages. The interface used for serial downloading of Flash is the UART.
Second, the Flash may be programmed or erased in the end-user application by
calling low-level routines through a common entry point in the Boot ROM.
Third, the Flash may be programmed using the parallel method by using a
conventional EPROM programmer. The parallel programming method used by
these devices is similar to that used by EPROM 87C51 but it is not identical and the
commercially available programmers need to have support for the AT89C51ID2.
The bootloader and the Application Programming Interface (API) routines are
located in the BOOT ROM.
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