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STPCELITE 数据表(PDF) 31 Page - STMicroelectronics |
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STPCELITE 数据表(HTML) 31 Page - STMicroelectronics |
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31 / 87 page ![]() STRAP OPTION Release 1.3 - January 29, 2002 31/87 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 3.1.4. HCLK STRAP REGISTER CONFIGURATION HCLK_Strap Access = 0022h/0023h Regoffset = 05Fh 76543210 MD3 MD2 MD26 MD25 MD24 Rsv This register defaults to the values sampled on MD[3:2] and MD[26:24] pins after reset Bit Number Sampled Mnemonic Description Bits 7-3 MD[3:2] & [26:24] These bits reflect the values sampled on MD[3:2] and MD[26:24] pins respectively and control the Host clock frequency synthesizer, as given in Table 3-4. Bits 2-0 Rsv Reserved Table 3-4. HCLK Frequency Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 HCLK Frequency 00000 25 MHz 00001 50 MHz 00010 60 MHz 00011 66 MHz 01001 75 MHz 01110 82.5 MHz 10011 90 MHz 11001 100 MHz |
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