CY28381 Datasheet, PDF (9/19 Pages) Cypress Semiconductor – High-Performance SiS645DX/648DX/650/651 Intel Pentium 4 Clock Synthesizer

CY28381
Table 9. Watchdog Time Stamp Table
WD(3:0)
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
FUNCTION
Off
1 second
2 seconds
3 seconds
4 seconds
5 seconds
6 seconds
7 seconds
8 seconds
9 seconds
10 seconds
11 seconds
12 seconds
13 seconds
14 seconds
15 seconds
Byte 13: Dial-a-Frequency Control Register N (all bits are read- and write-functional)^[5]
Bit
@Pup
7
0
Reserved
6
0
N6, MSB
5
0
N5
4
0
N4
3
0
N3
2
0
N2
1
0
N3
0
0
N0, LSB
Description
Byte 14: Dial-a-Frequency Control Register R (all bits are read- and write-functional)^{[5, 6]}
Bit
@Pup
Description
7
0
Reserved
6
0
R5 MSB
5
0
R4
4
0
R3
3
0
R2
2
0
R1
1
0
R0, LSB
0
0
R and N register mux selection. 0 = R and N values come from the ROM. 1 = data is loaded
from the Dial-a-Frequency registers into R and N.
Notes:
5. Byte 13 and Byte 14 should be written together in every case.
6. The range of R = (20...60), The range of N = (21...125) and N > R > N/2.
Document #: 38-07546 Rev. **
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