CY28346
Byte 6: Silicon Signature Register[4] (all bits are Read-only)
Bit
7
@Pup
Pin#
Description
Description
Description
0
0
0
1
0
0
1
1
Revision = 0001
6
5
4
3
Vendor Code = 0011
2
1
0
Byte 7: Reserved Register
Bit
7
@Pup
Pin#
0
0
0
0
0
0
0
0
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
Reserved. Set = 0.
6
5
4
3
2
1
0
Byte 8: Dial-a-Frequency Control Register N
Bit
7
@Pup
Name
0
0
0
0
0
0
0
0
Reserved. Set = 0.
6
N6, MSB 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
5
N5
(clocks that are generated from the same PLL, such as PCI) remain at their existing ratios
relative to the CPU clock.
4
N4
3
N3
2
N2
1
N3
0
N0, LSB
Byte 9: Dial-a-Frequency Control Register R
Bit
7
@Pup
Name
Description
0
0
0
0
0
0
0
Reserved. Set = 0.
6
R5, MSB
R4
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.
5
4
R3
3
R2
2
R1
1
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.
0
0
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 ]
