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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ATAR080 датащи(PDF) 64 Page - ATMEL Corporation |
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ATAR080 датащи(HTML) 64 Page - ATMEL Corporation |
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64 / 68 page  64 ATAR080 4675D–4BMCU–12/04 Figure 77. Output Low Current versus T amb, VDD = 6.5 V, VOL = 0.2 × VDD Emulation The basic function of emulation is to test and evaluate the customer's program and hardware in real time. This therefore enables the analysis of any timing, hardware or software problem. For emulation purposes, all MARC4 controllers include a special emulation mode. In this mode, the internal CPU core is inactive and the I/O buses are available via Port 0 and Port 1 to allow an external access to the on-chip peripherals. The MARC4 emulator uses this mode to control the peripherals of any MARC4 control- ler (target chip) and emulates the lost ports for the application. The MARC4 emulator can stop and restart a program at specified points during execu- tion, making it possible for the applications engineer to view the memory contents and those of various registers during program execution. The designer also gains the ability to analyze the executed instruction sequences and all the I/O activities. Figure 78. MARC4 Emulation 0 5 10 15 20 25 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 T amb (°C) max. typ. min. MARC4 target chip CORE (inactive) Application-specific hardware Peripherals MARC4 emulator Program memory Trace memory Control logic Personal computer CORE MARC4 emulation-CPU I/O control I/O bus Port 0 Port 1 SYSCL/ TCL, TE, NRST Emulation control Emulator target board |
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