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ICS952607 Datasheet(PDF) 12 Page - Integrated Circuit Systems |
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ICS952607 Datasheet(HTML) 12 Page - Integrated Circuit Systems |
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12 / 21 page  12 Integrated Circuit Systems, Inc. ICS952607 Advance Information 0734—07/16/04 I 2C Table: VCO Frequency Control Register Control Function Bit 7 N Div7 RW X Bit 6 N Div6 RW X Bit 5 N Div5 RW X Bit 4 N Div4 RW X Bit 3 N Div3 RW X Bit 2 N Div2 RW X Bit 1 N Div1 RW X Bit 0 N Div0 RW X I 2C Table: Spread Spectrum Control Register Control Function Bit 7 SSP7 RW X Bit 6 SSP6 RW X Bit 5 SSP5 RW X Bit 4 SSP4 RW X Bit 3 SSP3 RW X Bit 2 SSP2 RW X Bit 1 SSP1 RW X Bit 0 SSP0 RW X I 2C Table: Spread Spectrum Control Register Control Function Bit 7 Reserved Reserved R 0 Bit 6 Reserved Reserved R 0 Bit 5 SSP13 RW X Bit 4 SSP12 RW X Bit 3 SSP11 RW X Bit 2 SSP10 RW X Bit 1 SSP9 RW X Bit 0 SSP8 RW X I 2C Table: Output Divider Control Register Control Function Bit 7 SRC Div3 RW 0000:/2 0100:/4 1000:/8 1100:/16 X Bit 6 SRC Div2 RW 0001:/3 0101:/6 1001:/12 1101:/24 X Bit 5 SRC Div1 RW 0010:/5 0110:/10 1010:/20 1110:/40 X Bit 4 SRC Div0 RW 0011:/7 0111:/14 1011:/28 1111:/56 X Bit 3 CPU Div3 RW 0000:/2 0100:/4 1000:/8 1100:/16 X Bit 2 CPU Div2 RW 0001:/3 0101:/6 1001:/12 1101:/24 X Bit 1 CPU Div1 RW 0010:/5 0110:/10 1010:/20 1110:/40 X Bit 0 CPU Div0 RW 0011:/7 0111:/14 1011:/28 1111:/56 X 01 01 0 These Spread Spectrum bits in Byte 13 and 14 will program the spread pecentage. It is recommended to use ICS Spread % table for spread programming. These Spread Spectrum bits in Byte 13 and 14 will program the spread pecentage. It is recommended to use ICS Spread % table for spread programming. 01 -- -- 1 The decimal representation of M and N Divier in Byte 11 and 12 will configure the VCO frequency. Default at power up = latch-in or Byte 0 Rom table. VCO Frequency = 14.318 x [NDiv(8:0)+8] / [MDiv(6:0)+2] - CPUDivider Ratio Programmaing Bits - - - PWD - SRC Divider Ratio Programmaing Bits - - - Byte 15 Pin # Name Type - - Spread Spectrum Programming b(13:8) - - - - - PWD - Byte 14 Pin # Name Type PWD - Spread Spectrum Programming b(7:0) - - - - - - - Name Type - - Byte 13 Pin # PWD - N Divider Programming b(8:0) - - - - - Byte 12 Pin # Name Type |
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