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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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DSP56303 数据表(PDF) 224 Page - Freescale Semiconductor, Inc |
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DSP56303 数据表(HTML) 224 Page - Freescale Semiconductor, Inc |
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224 / 292 page  DSP56303 User’s Manual, Rev. 2 A-2 Freescale Semiconductor Bootstrap Program ; be specified. The SCI bootstrap code expects to receive 3 bytes ; specifying the number of program words, 3 bytes specifying the address ; to start loading the program words and then 3 bytes for each program ; word to be loaded. The number of words, the starting address and the ; program words are received least significant byte first followed by the ; mid and then by the most significant byte. After receiving the ; program words, program execution starts in the same address where ; loading started. The SCI is programmed to work in asynchronous mode ; with 8 data bits, 1 stop bit and no parity. The clock source is ; external and the clock frequency must be 16x the baud rate. ; After each byte is received, it is echoed back through the SCI ; transmitter. ; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; If MC:MB:MA=100, then it loads the program RAM from the Host ; Interface programmed to operate in the ISA mode. ; The HOST ISA bootstrap code expects to read a 24-bit word ; specifying the number of program words, a 24-bit word specifying the address ; to start loading the program words and then a 24-bit word for each program ; word to be loaded. The program words will be stored in ; contiguous PRAM memory locations starting at the specified starting address. ; After reading the program words, program execution starts from the same ; address where loading started. ; The Host Interface bootstrap load program may be stopped by ; setting the Host Flag 0 (HF0). This will start execution of the loaded ; program from the specified starting address. ; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; If MC:MB:MA=101, then it loads the program RAM from the Host ; Interface programmed to operate in the HC11 non multiplexed mode. ; ; The HOST HC11 bootstrap code expects to read a 24-bit word ; specifying the number of program words, a 24-bit word specifying the address ; to start loading the program words and then a 24-bit word for each program ; word to be loaded. The program words will be stored in ; contiguous PRAM memory locations starting at the specified starting address. ; After reading the program words, program execution starts from the same ; address where loading started. ; The Host Interface bootstrap load program may be stopped by ; setting the Host Flag 0 (HF0). This will start execution of the loaded ; program from the specified starting address. ; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ; If MC:MB:MA=110, then it loads the program RAM from the Host ; Interface programmed to operate in the 8051 multiplexed bus mode, ; in double-strobe pin configuration. ; The HOST 8051 bootstrap code expects accesses that are byte wide. ; The HOST 8051 bootstrap code expects to read 3 bytes forming a 24-bit word ; specifying the number of program words, 3 bytes forming a 24-bit word ; specifying the address to start loading the program words and then 3 bytes ; forming 24-bit words for each program word to be loaded. |
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