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CY28317ZC-2 Datasheet(PDF) 11 Page - SpectraLinear Inc |
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CY28317ZC-2 Datasheet(HTML) 11 Page - SpectraLinear Inc |
11 / 20 page CY28317-2 Rev 1.0, November 25, 2006 Page 11 of 20 Byte 14: Programmable Frequency Select M-Value Register Bit Name Default Description Bit 7 Pro_Freq_EN 0 Programmable output frequencies enabled 0 = Disabled 1 = Enabled Bit 6 CPU_FSEL_M6 0 If Prog_Freq_EN is set, CY28317-2 will use the values programmed in CPU_FSEL_N[7:0] and CPU_FSEL_M[6:0] to determine the CPU output frequency. The new frequency will start to load whenever CPU_FSELM[6:0] is updated. The setting of the FS_Override bit determines the frequency ratio for CPU, SDRAM and PCI. When it is cleared, CY28317-2 will use the same frequency ratio stated in the Latched FS[4:0] register. When it is set, CY28317-2 will use the frequency ratio stated in the SEL[4:0] register. CY28317-2 supports programmable CPU frequencies ranging from 50 MHz to 248 MHz. Bit 5 CPU_FSEL_M5 0 Bit 4 CPU_FSEL_M4 0 Bit 3 CPU_FSEL_M3 0 Bit 2 CPU_FSEL_M2 0 Bit 1 CPU_FSEL_M1 0 Bit 0 CPU_FSEL_M0 0 Byte 15: Reserved Register Bit Pin# Name Default Description Bit 7 – Reserved 0 Reserved Bit 6 – Reserved 0 Reserved Bit 5 – Reserved 0 Reserved Bit 4 – Reserved 0 Reserved Bit 3 – Reserved 0 Reserved Bit 2 – Vendor test mode 0 Reserved. Write with ‘0’ Bit 1 – Vendor test mode 1 Test mode. Write with ‘1’ Bit 0 – Vendor test mode 1 Test mode. Write with ‘1’ Byte 16: Reserved Register Bit Pin# Name Default Description Bit 7 – Reserved 0 Reserved Bit 6 – Reserved 0 Reserved Bit 5 – Reserved 0 Reserved Bit 4 – Reserved 0 Reserved Bit 3 – Reserved 0 Reserved Bit 2 – Reserved 0 Reserved Bit 1 – Reserved 0 Reserved Byte 17: Reserved Register Bit Pin# Name Default Description Bit 7 – Reserved 0 Reserved Bit 6 – Reserved 0 Reserved Bit 5 – Reserved 0 Reserved Bit 4 – Reserved 0 Reserved Bit 3 – Reserved 0 Reserved Bit 2 – Reserved 0 Reserved Bit 1 – Reserved 0 Reserved |
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