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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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P89LPC970FDH датащи(PDF) 10 Page - NXP Semiconductors |
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P89LPC970FDH датащи(HTML) 10 Page - NXP Semiconductors |
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10 / 66 page  P89LPC97X_2 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 02 — 27 April 2010 10 of 66 NXP Semiconductors P89LPC970/971/972 8-bit microcontroller with accelerated two-clock 80C51 core 7. Functional description Remark: Please refer to the P89LPC970/971/972 User manual for a more detailed functional description. 7.1 Special function registers Remark: SFR accesses are restricted in the following ways: • User must not attempt to access any SFR locations not defined. • Accesses to any defined SFR locations must be strictly for the functions for the SFRs. • SFR bits labeled ‘-’, ‘0’ or ‘1’ can only be written and read as follows: – ‘-’ Unless otherwise specified, must be written with ‘0’, but can return any value when read (even if it was written with ‘0’). It is a reserved bit and may be used in future derivatives. – ‘0’ must be written with ‘0’, and will return a ‘0’ when read. – ‘1’ must be written with ‘1’, and will return a ‘1’ when read. |
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