CY28317ZC-2T SPECTRALINEAR [SpectraLinear Inc], CY28317ZC-2T Datasheet - Page 11

• Manufacturer Part Number: CY28317ZC-2T
• Manufacturer: SPECTRALINEAR [SpectraLinear Inc]

Rev 1.0, November 25, 2006
Byte 14: Programmable Frequency Select M-Value Register
Byte 15: Reserved Register
Byte 16: Reserved Register
Byte 17: Reserved Register
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit
Bit
Bit
Bit
Pro_Freq_EN
CPU_FSEL_M6
CPU_FSEL_M5
CPU_FSEL_M4
CPU_FSEL_M3
CPU_FSEL_M2
CPU_FSEL_M1
CPU_FSEL_M0
Name
Pin#
Pin#
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Pin#
–
–
–
–
–
–
–
–
Default
0
0
0
0
0
0
0
0
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Vendor test mode
Vendor test mode
Vendor test mode
Name
Name
Programmable output frequencies enabled
If Prog_Freq_EN is set, CY28317-2 will use the values programmed in
0 = Disabled
1 = Enabled
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.
Name
Default
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Default
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
0
0
0
0
0
0
1
1
Description
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved. Write with ‘0’
Test mode. Write with ‘1’
Test mode. Write with ‘1’
Description
Description
Description
CY28317-2
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