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STPC12GDYC 数据表(PDF) 40 Page - STMicroelectronics |
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STPC12GDYC 数据表(HTML) 40 Page - STMicroelectronics |
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40 / 111 page  STRAP OPTION 40/111 Issue 1.0 - July 24, 2002 3.2. TYPICAL STRAP OPTION IMPLEMENTATION Table Table 3-1.shows the detailed Strap options required to boot the STPC in ISA mode with a Host Clock Frequency of 66MHz in X2 mode with internal keyboard/mouse, UARTS and parallel port enabled. Signal Designation Actual Settings Description MD1 Reserved2 Pull Up - MD2 HCLK Speed Pull down HCLK = 66MHz MD3 Pull down MD[4] PCI_CLKO Divisor Pull up PCICLK = HCLK/2 MD[5] MCLK Synchro (see Section 3.1.1. ) Pull down Asynchronous MD[6] PCI_CLKO Programming Pull up PCICLK PLL Window = 32MHz - 64MHz MD[7] Pull down MD[8] ISA / PCMCIA / Local Bus Pull down ISA Mode MD[9] Pull down MD10 Reserved2 Pull down - MD11 Reserved2 Pull down - MD14 CPU clock Multiplication Pull up X2 Mode MD15 Reserved2 Pull up - MD16 Reserved2 Pull up - MD17 PCI_CLKO Divisor Pull up PCICLK = HCLK/2 MD18 HCLK Pad Direction Pull up Output MD19 MCLK Pad Direction Pull up Output MD20 DCLK Pad Direction Pull up Output MD21 Reserved2 Pull up - MD23 Reserved2 Pull up - MD24 HCLK PLL Speed Pull up HCLK = 66MHz MD25 Pull up MD26 Pull down MD27 Reserved2 Pull up - MD28 Reserved2 Pull up - MD29 Reserved2 Pull up - MD30 Reserved2 Pull up - MD31 Reserved2 Pull up MD32 Reserved2 Pull down MD33 Reserved2 Pull up MD34 Reserved2 Pull down MD35 Reserved2 Pull down MD36 Local Bus Boot Device Size User defined Not Applicable MD37 Reserved2 Pull down - MD38 Reserved2 Pull down - MD40 CPU clock Multiplication Pull up X2 mode MD41 Reserved2 Pull down - MD42 Reserved2 Pull up - MD 43 Reserved2 Pull down - Note1: Strap options on TC/PA[3] and DACK_ENC[2:0]/PA[2:0] are required for all the STPC Atlas Configurations (ISA, PCMCIA, Local Bus). Note2: Must be implemented. Table 3-1. Typical Strap Option Implementation |
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