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T89C51RD2-RDTIM 数据表(PDF) 72 Page - ATMEL Corporation |
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T89C51RD2-RDTIM 数据表(HTML) 72 Page - ATMEL Corporation |
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72 / 104 page  72 T89C51RD2 4243G–8051–05/03 Example Read Function This flow is similar for the following frames: • Reading Frame • EOF Frame/Atmel Frame (only reading Atmel Frame) Description Figure 30. Read Flow Example HOST : 05 0000 04 0000 0020 00 D7 BOOTLOADER : 05 0000 04 0000 0020 00 D7 BOOTLOADER 0000=-----data------ CR LF (16 data) BOOTLOADER 0010=-----data------ CR LF (16 data) BOOTLOADER 0020=data CR LF ( 1 data) Display data from address 0000h to 0020h Host Bootloader Read Command RD_WR_SECURITY Wait Read Command Read Value Send Security error Send Data Read Send Read Command Wait Checksum Error Wait Value of Data Wait Security Error OR COMMAND ABORTED COMMAND FINISHED Send Checksum error COMMAND ABORTED ’L’ & CR & LF OR ’value’ & ’.’ & CR & LF Checksum error ’X’ & twice (CR & LF) HOST : 02 0000 05 07 02 F0 BOOTLOADER : 02 0000 05 07 02 F0 Value . CR LF HOST : 02 0000 01 02 00 FB BOOTLOADER : 02 0000 01 02 00 FB Value . CR LF Read function (read SBV) Atmel Read function (read Bootloader version) |
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