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T89C5115-TISIM 数据表(PDF) 38 Page - ATMEL Corporation |
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T89C5115-TISIM 数据表(HTML) 38 Page - ATMEL Corporation |
38 / 105 page 38 T89C5115 4128A–8051–04/02 In-System Programming (ISP) With the implementation of the User Space (FM0) and the Boot Space (FM1) in Flash technology the T89C5115 allows the system engineer the development of applications 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 assembly the 1st personalization of the product by programming in the FM0 and if needed also a customized Boot loader in the FM1. Atmel provide also a standard Boot loader by default UART • After assembling on the PCB in its final embedded position by serial mode via the UART. 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 16-Kbyte 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 user’s bootloader located in FM0 at [SBV]00h. • A further method exist in activating the Atmel boot loader by hardware activation. • The FM0 can be programmed also by the parallel mode using a programmer. Figure 16. Flash Memory Mapping F800h 3FFFh 16-KB Flash memory 2K Bytes IAP bootloader FM0 FM1 Custom Boot Loader [SBV]00h FFFFh FM1 mapped between F800h and FFFFh when API called 0000h |
类似零件编号 - T89C5115-TISIM |
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类似说明 - T89C5115-TISIM |
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