SL28647 datasheet(9/27 Pages) SILABS

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SL28647

.......................Document #: 001-05103 Rev *B Page 9 of 27

27M_SS/LCD 96_100M SS Spread Spectrum Selection table:

S[1:0] SS%

‘00’ = –0.5%(Default value)

‘01’ = –1.0%

‘10’ = –1.5%

‘11’ = –2.0%

RESERVED

27M_SS_OE

27M_SS Output Enable

0 =Disabled, 1 = Enabled

27M_SS/LCD_96M/100M

Spread Enable

27M_SS/LCD_96/100M Spread spectrum enable.

0 = Spread Disabled, 1 = Spread Enabled

RESERVED

Byte 10 Control Register 10 (continued)

Bit

@Pup

Name

Description

Byte 11 Control Register 11

Bit

@Pup

Name

Description

RESERVED

SRC9_OE

SRC9 Output Enable

0 = Disabled, 1 = Enabled

SRC8_OE

SRC8 Output Enable

0 = Disabled, 1 = Enabled

RESERVED

SRC10_STP_CTRL

Allow control of SRC10 with assertion of SW PCI_STP#

0 = Free running, 1 = Stopped with PCI_STP#

SRC9_STP_CTRL

Allow control of SRC9 with assertion of SW PCI_STP#

0 = Free running, 1 = Stopped with PCI_STP#

SRC8_STP_CTRL

Allow control of SRC8 with assertion of SW PCI_STP#

0 = Free running, 1 = Stopped with PCI_STP#

Byte 12 Control Register 12

Bit

@Pup

Name

Description

DIAG_EN

Diagnostic Bits Enabled

0 = Reset (default) setting bit 6, 5, 4, 2, 0 to zero

1 = DIAG mode enabled

CPU PLL Status

CPU_PLL status

0 = PLL not locked; 1 = PLL locked

Video PLL Status

Video_PLL status

0 = PLL not locked; 1 = PLL locked

Fixed PLL Status

Fixed_PLL status

0 = PLL not locked; 1 = PLL locked

PCIe PLL Status

PCIe_PLL status

0 = PLL not locked; 1 = PLL locked

Frequency Accuracy

Primiary PLL or external crystal Frequency Accuracy

0=Frequency not accurate, 1=Frequency Accurate

Byte 0 Access

Byte 0 Access Control

0 = Disabled, 1 = Enabled

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