CY28405
Byte 7: Vendor ID
Bit @Pup
Name
Name
Description
Description
0
0
Vendor ID Bit 0
Byte 8: Control Register 8
Bit
7
@Pup
0
1
1
CPU
PCIF
PCI
Spread Spectrum Selection
‘000’ = 0.20% triangular
‘001’ = + 0.12, – 0.62%
‘010’ = + 0.25, – 0.75%
6
5
3V66
‘011’ = –0.05, – 0.45% triangular
‘100’ = 0.25%
‘101’ = + 0.00, – 0.50%
‘110’ = 0.5%
‘111’ = 0.38%
4
3
2
1
0
0
0
0
0
0
FSEL_4
FSEL_3
FSEL_2
FSEL_1
FSEL_0
SW Frequency selection bits. See Table 1.
Byte 9: Control Register 9
Bit
@Pup
Name
Description
7
0
PCIF
PCIF Clock Output Drive Strength Control
0 = Low Drive strength, 1 = High Drive strength
6
5
4
3
2
0
0
1
PCI
PCI Clock Output Drive Strength
0 = Low Drive strength, 1 = High Drive strength
3V66
3V66 Clock Output Drive Strength
0 = Low Drive strength, 1 = High Drive strength
REF
REF Clock Output Drive Strength
0 = Low Drive strength, 1 = High Drive strength
1
(‘404: 1)
Reserved
Reserved
Reserved
1
Reserved
(Reserved for CY28404:
REF2
(Reserved for CY28404:
REF2 Output Enable
0 = Disabled, 1 = Enabled)
1
0
0
0
Reserved
Reserved
Vendor Test Mode (always program to 0) PLL Bypass Test
Vendor Test Mode (always program to 0) PLL Leakage Test
Byte 10: Control Register 10
Bit
7
@Pup
Name
PCI_Skew1
Description
0
0
PCI skew control
00 = Normal
01 = –500 ps
10 = Reserved
11 = +500 ps
6
PCI_Skew0
5
4
0
0
3V66_Skew1
3V66_Skew0
3V66 skew control
00 = Normal
01 = –150 ps
10 = +150 ps
11 = +300 ps
3
2
1
1
Reserved
Reserved
Reserved, Set = 1
Reserved, Set = 1
Rev 1.0,November 20, 2006
Page 8 of 18
SPECTRALINEAR [ SPECTRALINEAR INC ]
