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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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Z80 датащи(PDF) 19 Page - Zilog, Inc. |
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Z80 датащи(HTML) 19 Page - Zilog, Inc. |
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19 / 330 page  <%272GTKRJGTCNU 7UGT /CPWCN UM008101-0601 Counter/Timer Channels Counter/Timer Channels CTC FEATURES • Four independently programmable counter/timer channels (CTC), each with a readable down-counter and a selectable 16 or 256 prescaler. Down-counters are reloaded automatically at zero count • Selectable positive or negative trigger initiates timer operation • Three channels have zero count/timeout outputs capable of driving Darlington transistors • NMOS version for high-cost performance solutions • CMOS version for the designs requiring low power consumption • NMOS Z0843004 - 4 MHz, Z0843006 - 6.17 MHz • CMOS Z84C3006 - dc to 6.17 MHz, Z84C3008 dc to 8 MHz, Z84C3010 - dc to 10 MHz • Interfaces directly to the Z80 CPU. Interfaces to the Z80 SIO for baud rate generation • Standard Z80 Family daisy-chain interrupt structure provides fully vectored, prioritized interrupts without external logic. The CTC may also be used as an interrupt controller • A 6 MHz version supports 6.144 MHz CPU clock operation CTC General Description The Z80 CTC is a four-channel counter/timer that can be programmed by system software for a broad range of counting and timing applications. These four independently programmable channels satisfy common |
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