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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AM186ED-20KC/W датащи(PDF) 38 Page - Advanced Micro Devices |
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AM186ED-20KC/W датащи(HTML) 38 Page - Advanced Micro Devices |
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38 / 88 page  38 Am186ED/EDLV Microcontrollers PRELI M INARY D RA F T PERIPHERAL CONTROL BLOCK The integrated peripherals of the Am186ED/EDLV mi- crocontrollers are controlled by 16-bit read/write regis- ters. The peripheral registers are contained within an internal 256-byte peripheral control block (PCB). The registers are physically located in the peripheral de- vices they control, but they are addressed as a single 256-byte block. Table 8 shows a map of these regis- ters. Reading and Writing the PCB Code written for the Am186ED/EDLV microcontrollers should perform all writes to the PCB registers as byte writes. These writes transfer 16 bits of data to the PCB register even if an 8-bit register is named in the instruc- tion. For example, out dx, al results in the value of ax being written to the port address in dx. Reads to the PCB should be done as word reads. Code written in this manner runs correctly on the Am186ED/EDLV mi- crocontrollers with the PCB overlayed on either 8- or 16-bit address spaces. Unaligned reads and writes to the PCB result in unpre- dictable behavior. For a complete description of all the registers in the PCB, see the Am186ED/EDLV Microcontrollers User’s Manual, order# 21335A. |
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