CY28346
Byte 6: Silicon Signature Register
[4]
(all bits are Read-only)
Bit
7
6
5
4
3
2
1
0
@Pup
0
0
0
1
0
0
1
1
Vendor Code = 0011
Pin#
Revision = 0001
Description
Byte 7: Reserved Register
Bit
7
6
5
4
3
2
1
0
@Pup
0
0
0
0
0
0
0
0
Pin#
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Description
Byte 8: Dial-a-Frequency Control Register N
Bit
7
6
5
4
3
2
1
0
@Pup
0
0
0
0
0
0
0
0
N6, MSB
N5
N4
N3
N2
N3
N0, LSB
Name
Reserved. Set = 0.
These bits are for programming the PLL’s internal N register. This access allows the user to
modify the CPU frequency at very high resolution (accuracy). All other synchronous clocks
(clocks that are generated from the same PLL, such as PCI) remain at their existing ratios
relative to the CPU clock.
Description
Byte 9: Dial-a-Frequency Control Register R
Bit
7
6
5
4
3
2
1
0
@Pup
0
0
0
0
0
0
0
0
R5, MSB
R4
R3
R2
R1
R0
DAF_ENB
R and N register mux selection. 0 = R and N values come from the ROM. 1 = data is loaded
from DAF (SMBus) registers.
Name
Reserved. Set = 0.
These bits are for programming the PLL’s internal R register. This access allows the user to
modify the CPU frequency at very high resolution (accuracy). All other synchronous clocks
(clocks that are generated from the same PLL, such as PCI) remain at their existing ratios
relative to the CPU clock.
Description
Note:
4. When writing to this register, the device will acknowledge the Write operation, but the data itself will be ignored.
Rev 1.0, November 24, 2006
Page 5 of 19
SPECTRALINEAR [ SPECTRALINEAR INC ]
