SL28647
.....................Document #: 001-05103 Rev *B Page 10 of 27
0 HW PWRGOOD Power on reset status bit
0 = All of the below conditions are not meet
1 = Valid voltage levels exist on VDD_SRC/CPU, VDD_REF, VDDA,
VDD_48, VDD_PCI and CKPWRGD is asserted and external crystal is
detected.
Byte 12 Control Register 12
Bit @Pup Name Description
Byte 13 Control Register 13
Bit @Pup Name Description
7 0 CLKREQ#9 CLKREQ#9 Input Enable
0 = Disabled, 1 = Enabled
6 0 CLKREQ#8 CLKREQ#8 Input Enable
0 = Disabled, 1 = Enabled
5 0 CLKREQ#7 CLKREQ#7 Input Enable
0 = Disabled, 1 = Enabled
4 0 CLKREQ#6 CLKREQ#6 Input Enable
0 = Disabled, 1 = Enabled
3 0 CLKREQ#5 CLKREQ#5 Input Enable
0 = Disabled, 1 = Enabled
2 0 CLKREQ#4 CLKREQ#4 Input Enable
0 = Disabled, 1 = Enabled
1 0 CLKREQ#3 CLKREQ#3 Input Enable
0 = Disabled, 1 = Enabled
0 0 CLKREQ#2 CLKREQ#2 Input Enable
0 = Disabled, 1 = Enabled
Byte 14 Control Register 14
Bit @Pup Name Description
7 0 CLKREQ#1 CLKREQ#1 Input Enable
0 = Disabled, 1 = Enabled
6 1 LCD _96/100M Clock
Speed
LCD 96_100M Clock Speed
0 = 96 MHz, 1 = 100 MHz
5 1 27M_SS Bit 0 27M SS Slew Rate Control Bit 0,
See Table 6 for more detail
0 = Low, 1 = High
4 1 27M_non-SS Bit 0 27M non-SS Slew Rate Control Bit 0,
See Table 6 for more detail
0 = Low, 1 = High
3 1 PCI4 Bit 0 PCI4 Slew Rate Control Bit 0,
See Table 6 for more detail
0 = Low, 1 = High
2 1 PCI3 Bit 0 PCI3 Slew Rate Control Bit 0,
See Table 6 for more detail
0 = Low, 1 = High
1 1 PCI2 Bit 0 PCI2 Slew Rate Control Bit 0,
See Table 6 for more detail
0 = Low, 1 = High
0 1 PCI1 Bit 0 PCI1Slew Rate Control Bit 0,
See Table 6 for more detail
0 = Low, 1 = Highh
Byte 15 Control Register 15
Bit @Pup Name Description
7 HW TME_STRAP Trusted mode enable strap status,
0 = Normal
1 = No overclocking (default)
6 1 RESERVED RESERVED
5 1 RESERVED RESERVED
SL28647
.....................Document #: 001-05103 Rev *B Page 11 of 27
4 1 RESERVED RESERVED
3 1 RESERVED RESERVED
2 1 IO_VOUT2 IO_VOUT[2,1,0]
000 = 0.30V
001 = 0.40V
010 = 0.50V
011 = 0.60V
100 = 0.70V
101 = 0.80V (Default)
110 = 0.90V
111 = 1.00V
1 0 IO_VOUT1
0 1 IO_VOUT0
Byte 15 Control Register 15
Bit @Pup Name Description
Byte 16 Control Register 16
Bit @Pup Name Description
7 1 PCI4 Bit 1 PCI4 Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
6 1 PCI3 Bit 1 PCI3 Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
5 1 PCI2 Bit 1 PCI2 Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
4 1 PCI1 Bit 1 PCI1 Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
3 1 PCIF0 Bit 1 PCIF0 Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
2 1 48M Bit 1 48M Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
1 1 27M_SS Bit 1 27M_SS Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
0 1 27M_non-SS Bit 1 27M_non-SS Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
Byte 17 Control Register 17
Bit @Pup Name Description
7 1 27M_SS Bit 2 27MHz_SS Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
6 1 27M_non_SS Bit 2 27MHz_non_SS Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
5 1 REF1 Bit 1 REF1 Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
4 1 REF0 Bit 1 REF0 Slew Rate Control Bit 1,
See Table 6 for more detail
0=Low, 1 = High
3 1 REF1 Bit 2 REF1 Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
2 1 REF0 Bit 2 REF0 Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
1 0 RESERVED RESERVED
0 0 RESERVED RESERVED
SL28647
.....................Document #: 001-05103 Rev *B Page 12 of 27
The SL28647 requires a Parallel Resonance Crystal. Substi-
tuting a series resonance crystal will cause the SL28647 to
operate at the wrong frequency and violate the ppm specifi-
cation. For most applications there is a 300-ppm frequency
Byte 18 Control Register 18
Bit @Pup Name Description
7 1 RESERVED RESERVED
6 1 RESERVED RESERVED
5 1 RESERVED RESERVED
4 1 RESERVED RESERVED
3 1 RESERVED RESERVED
2 1 RESERVED RESERVED
1 1 RESERVED RESERVED
0 1 RESERVED RESERVED
Byte 19 Control Register 19
Bit @Pup Name Description
7 1 PCI4 Bit 2 PCI4 Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
6 1 PCI3 Bit 2 PCI3 Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
5 1 PCI2 Bit 2 PCI2 Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
4 1 PCI1 Bit 2 PCI1 Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
3 1 PCIF0 Bit 2 PCIF0 Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
2 1 48M Bit 2 48M Slew Rate Control Bit 2,
See Table 6 for more detail
0=Low, 1 = High
1 1 RESERVED RESERVED
0 1 RESERVED RESERVED
Table 7. Crystal Recommendation
Frequency
(Fund) Cut Loading Load Cap
Drive
(max.)
Shunt Cap
(max.)
Motional
(max.)
Tolerance
(max.)
Stability
(max.)
Aging
(max.)
14.31818 MHz AT Parallel 20 pF 0.1 mW 5 pF 0.016 pF 35 ppm 30 ppm 5 ppm
Table 6. Slew Rate Control Table
Bit2 Bit1 Bit0
Default 1 1 1 Fastest
110
101
100
011
010
001
000Slowest
Slew Rate Control Bit [2:0]
Slew Rate

SL28647BLCT

Mfr. #:
Manufacturer:
Silicon Labs
Description:
Clock Generators & Support Products Montevina
Lifecycle:
New from this manufacturer.
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