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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PCA2001 датащи(PDF) 12 Page - NXP Semiconductors |
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PCA2001 датащи(HTML) 12 Page - NXP Semiconductors |
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12 / 30 page  PCA2000_2001 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 08 — 23 August 2010 12 of 30 NXP Semiconductors PCA2000; PCA2001 32 kHz watch circuit with programmable adaptive motor pulse 2. Enter the data to be stored in the shift register (td =t2 or t3). LSB first (bit 8) and the MSB last (bit 1). 3. Applying the two-stage programming pulse Vprestore followed by Vstore stores the word. The delay between the last data bit and the prestore pulse Vprestore is td =t4. Store the word by raising the supply voltage to Vstore; the delay between the last data bit and the store pulse is td. The example shown in Figure 7 performs the following functions: • Start • Setting instruction counter to state 4 (word B) • Entering data word 110101 into the shift register (sequence: LSB first and MSB last) • Writing to the OTP cells for word B The example shows the programming of B = 110101 (the sequence is LSB first and MSB last). Fig 7. Supply voltage modulation for programming mgw356 VDD(nom) VP(mod) VDD VSS VP(prog)(start) tp(start) t0 t1 t1 t1 t3 t2 t3 t2 t3 t3 t4 tw(store) Vstore Vprestore tw(prestore) |
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