cy28rs680-2 SpectraLinear Inc, cy28rs680-2 Datasheet - Page 8

• Manufacturer Part Number: cy28rs680-2
• Description: Clock Generator For Ati Rs5xx/6xx Chipsets
• Manufacturer: SpectraLinear Inc

Rev 1.0, November 22, 2006
Byte 12: CPU DAF Register1
Byte 13: CPU DAF Register2
Byte 14: ATIG DAF Register1
Byte 15: WDT Recovery Register
Byte 16: Overclocking support Register
Bit
Bit
Bit
Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
@Pup
@Pup
@Pup
@Pup
@Pup
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
RECOVERY_N[7]
RECOVERY_N[6]
RECOVERY_N[5]
RECOVERY_N[4]
RECOVERY_N[3]
RECOVERY_N[2]
RECOVERY_N[1]
RECOVERY_N[0]
CPU_DAF_M[6]
CPU_DAF_M[5]
CPU_DAF_M[4]
CPU_DAF_M[3]
CPU_DAF_M[2]
CPU_DAF_M[1]
CPU_DAF_M[0]
ATIG_DAF_N[7]
ATIG_DAF_N[6]
ATIG_DAF_N[5]
ATIG_DAF_N[4]
ATIG_DAF_N[3]
ATIG_DAF_N[2]
ATIG_DAF_N[1]
ATIG_DAF_N[0]
CPU_DAF_N[7]
CPU_DAF_N[6]
CPU_DAF_N[5]
CPU_DAF_N[4]
CPU_DAF_N[3]
CPU_DAF_N[2]
CPU_DAF_N[1]
CPU_DAF_N[0]
CPU_DAF_N[8]
ATIG_N8
Name
Name
Name
Name
Name
INFORMATION
ADVANCE
If Prog_CPU_EN is set, the values programmed in CPU_DAF_N[8:0] and
CPU_DAF_M[6:0] will be used to determine the CPU output frequency.
The setting of the FS_Override bit determines the frequency ratio for CPU
and other output clocks. When it is cleared, the same frequency ratio
stated in the Latched FS[D:A] register will be used. When it is set, the
frequency ratio stated in the FSEL[3:0] register will be used.
If Prog_CPU_EN is set, the values programmed in CPU_DAF_N[8:0] and
CPU_DAF_M[6:0] will be used to determine the CPU output frequency.
The setting of the FS_Override bit determines the frequency ratio for CPU
and other output clocks. When it is cleared, the same frequency ratio
stated in the Latched FS[D:A] register will be used. When it is set, the
frequency ratio stated in the FSEL[3:0] register will be used.
If Prog_ATIG_EN is set, the values programmed in ATIG_DAF_N[8:0] will
be used to determine the ATIG output frequency.
Used when RESET_IN# is asserted or the Watch Dog timer times out. This
will be the safe value or last known good frequency of the CPU. It is set
by the user before engaging in any overclocking exercise. M values revert
to those set by the FS[C:A] pins
ATIG DAF bit N8
Description
Description
Description
Description
Description
CY28RS680-2
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