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ICS950402 датащи(PDF) 12 Page - Integrated Circuit Systems |
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ICS950402 датащи(HTML) 12 Page - Integrated Circuit Systems |
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12 / 19 page ![]() 12 ICS950402 0700B—04/30/04 I 2C Table: Drive Strength Control Register Control Function Bit 7 PCI10/HTT3 DrCntrl PCICLK10/HTTCLK3 Drive Strength Control RW 1X 2X 1 Bit 6 PCI6Drv PCICLK6 Drive Strength Control RW 1X 2X 1 Bit 5 PCI3Drv PCICLK3 Drive Strength Control RW 1.2X 2.3X 1 Bit 4 PCI2Drv PCICLK2 Drive Strength Control RW 1.2X 2.3X 1 Bit 3 PCIFDrv PCICLK_F Drive Strength Control RW 1X 2X 1 Bit 2 24_48Drv 24_48MHz Drive Strength Control RW 1X 2X 1 Bit 1 Reserved Reserved RW - - 1 Bit 0 Reserved Reserved RW - - 1 I 2C Table: Slew Rate Control Register Control Function Bit 7 Reserved Reserved RW - - X Bit 6 Reserved Reserved RW - - X Bit 5 SDRSlw1 RW - - 1 Bit 4 SDRSlw0 RW - - 0 Bit 3 PCISlw1 RW - - 1 Bit 2 PCISlw0 RW - - 0 Bit 1 PCISlw1 RW - - 1 Bit 0 PCISlw0 RW - - 0 I 2C Table: Slew Rate Control Register Control Function Bit 7 REFSlw1 RW - - 1 Bit 6 REFSlw0 RW - - 0 Bit 5 48MSlw1 RW - - 1 Bit 4 48MSlw0 RW - - 0 Bit 3 48MSlw1 RW - - 1 Bit 2 48MSlw0 RW - - 0 Bit 1 Reserved Reserved RW - - 1 Bit 0 Reserved Reserved RW - - 1 24_48MHz Slew Rate Control 01 PCICLK(9:7)/HTTCLK (2:0) Slew Rate Control PCICLK(3:0) Slew Rate Control PCICLK(11,8, 6:4) Slew Rate Control 48MHz Slew Rate Control - REF(2:0) Slew Rate Control PWD - Byte 24 Pin # Name Type - - - - - - - - - - - - - PWD - Byte 23 Pin # Name Type - - 1 0 - - - - PWD - - Byte 22 Pin # Name Type 1 0 Table 4: Asynchronous Fix PLL Frequency Select Table controlled by Byte 21 bits (1:0) Byte 21 Byte 21 VCO HTT HTT PCI PCI 48 48 REF Bit 1 Bit 0 FREQ DIV FREQ DIV FREQ DIV FREQ FREQ 0 0 528 8 66 8 33 11 48 14.318 0 1 Main PLL X Main PLL X Main PLL X 48 14.318 1 0 528 7 74.4286 7 37.7143 11 48 14.318 1 1 Main PLL X Main PLL X Main PLL X 48 14.318 |
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