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P89LPC933FDH датащи(PDF) 12 Page - NXP Semiconductors |
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P89LPC933FDH датащи(HTML) 12 Page - NXP Semiconductors |
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12 / 75 page ![]() 9397 750 15113 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Product data sheet Rev. 06 — 20 June 2005 12 of 75 Philips Semiconductors P89LPC933/934/935/936 8-bit microcontroller with accelerated two-clock 80C51 core 8. Functional description Remark: Please refer to the P89LPC933/934/935/936 User manual for a more detailed functional description. 8.1 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 ‘-’, logic 0 or logic 1 can only be written and read as follows: – ‘-’ Unless otherwise specified, must be written with logic 0, but can return any value when read (even if it was written with logic 0). It is a reserved bit and may be used in future derivatives. – Logic 0 must be written with logic 0, and will return a logic 0 when read. – Logic 1 must be written with logic 1, and will return a logic 1 when read. |
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