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STPC4EDBC 数据表(PDF) 31 Page - STMicroelectronics |
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STPC4EDBC 数据表(HTML) 31 Page - STMicroelectronics |
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31 / 93 page ![]() STRAP OPTIONS Release 1.5 - January 29, 2002 31/93 3.1.4. CPC STRAP REGISTER 0 CONFIGURATION Table 3-1. HCLK Frequency Programming HCLK_Strap Access = 0022h/0023h Regoffset = 05Fh 76543210 MD[3} MD[2] MD[26] MD[25] MD[24] Rsv This register defaults to the values sampled on MD pins after reset Bit Number Sampled Mnemonic Description Bits 7-3 MD[3:2] & MD[26:24] These pins reflect the values sampled on MD[3:2] and MD[26:24] pins respectively and control the Host clock frequency synthesizer as shown in Table 3-1 Bits 2-0 Rsv Reserved MD[3] MD[2] MD[26] MD[25] MD[24] HCLK Speed 00 000 25 MHz 00 001 50 MHz 00 010 60 MHz 00 011 66 MHz 01 001 75 MHz 10 011 90 MHz 11 001 100 MHz |
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