參數(shù)資料
型號(hào): DSPIC33FJ12MC202-E/SS
廠商: Microchip Technology
文件頁數(shù): 98/155頁
文件大?。?/td> 0K
描述: IC DSPIC MCU/DSP 12K 28SSOP
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
標(biāo)準(zhǔn)包裝: 47
系列: dsPIC™ 33F
核心處理器: dsPIC
芯體尺寸: 16-位
速度: 40 MIP
連通性: I²C,IrDA,SPI,UART/USART
外圍設(shè)備: 高級(jí)欠壓探測(cè)/復(fù)位,電機(jī)控制 PWM,QEI,POR,PWM,WDT
輸入/輸出數(shù): 21
程序存儲(chǔ)器容量: 12KB(12K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 6x10b/12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 125°C
封裝/外殼: 28-SSOP(0.209",5.30mm 寬)
包裝: 管件
47
A/T89C51AC2
4127H–8051–02/08
In-System
Programming (ISP)
With the implementation of the User Space (FM0) and the Boot Space (FM1) in Flash
technology the A/T89C51AC2 allows the system engineer the development of applica-
tions with a very high level of flexibility. This flexibility is based on the possibility to alter
the customer program at any stages of a product’s life:
Before mounting the chip on the PCB, FM0 Flash can be programmed with the
application code. FM1 is always preprogrammed by Atmel with a bootloader (UART
bootloader).(1)
Once the chip is mounted on the PCB, it can be programmed by serial mode via the
UART.
Note:
1. The user can also program his own bootloader in FM1.
This In-System-Programming (ISP) allows code modification over the total lifetime of the
product.
Besides the default Boot loader Atmel provide to the customer also all the needed Appli-
cation-Programming-Interfaces (API) which are needed for the ISP. The API are located
also in the Boot memory.
This allow the customer to have a full use of the 32 KB user memory.
Flash Programming and
Erasure
There are three methods of programming the Flash memory:
The Atmel bootloader located in FM1 is activated by the application. Low level API
routines (located in FM1) will be used to program FM0. The interface used for serial
downloading to FM0 is the UART. API can be called also by the user’s bootloader
located in FM0 at [SBV]00h.
A further method exists in activating the Atmel boot loader by hardware activation.
The FM0 can be programmed also by the parallel mode using a programmer.
Figure 25. Flash Memory Mapping
F800h
7FFFh
32 KB
Flash memory
2 KB IAP
bootloader
FM0
FM1
Custom
Boot Loader
[SBV]00h
FFFFh
FM1 mapped between F800h and FFFFh
when API called
0000h
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