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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LPC2194 датащи(PDF) 28 Page - NXP Semiconductors |
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LPC2194 датащи(HTML) 28 Page - NXP Semiconductors |
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28 / 33 page  Philips Semiconductors LPC2194 Single-chip 16/32-bit microcontrollers Preliminary data Rev. 01 — 06 February 2004 28 of 33 9397 750 12757 © Koninklijke Philips Electronics N.V. 2004. All rights reserved. 9. Dynamic characteristics [1] Parameters are valid over operating temperature range unless otherwise specified. [2] Bus capacitance Cb in pF, from 10 pF to 400 pF. Table 12: Characteristics Tamb =0 °Cto +70 °C for commercial, −40 °C to +85 °C for industrial, V18, V3 over specified ranges[1] Symbol Parameter Conditions Min Typ[1] Max Unit External Clock fosc Oscillator frequency supplied by an external oscillator (signal generator) 1 - 50 MHz External clock frequency supplied by an external crystal oscillator 1 - 30 MHz External clock frequency if on-chip PLL is used 10 - 25 MHz External clock frequency if ISP is used for initial code download 10 - 25 MHz tC Oscillator clock period 20 - 1000 ns tCHCX Clock high time tc × 0.4 - - ns tCLCX Clock low time tc × 0.4 - - ns tCLCH Clock rise time - - 5 ns tCHCL Clock fall time - - 5 ns Port Pins tRISE Port output rise time (except P0.2, P0.3) -10 - ns tFALL Port output fall time (except P0.2, P0.3) -10 - ns I2C pins tf Output fall time from VIH to VIL 20 + 0.1 × Cb[2] --ns |
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