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SL28541BZCT Datasheet(PDF) 15 Page - Silicon Laboratories

Part # SL28541BZCT
Description  Clock Generator for Intel짰Mobile Chipset
PDF  31 Pages
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

SL28541BZCT Datasheet(HTML) 15 Page - Silicon Laboratories

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SL28541
...................... DOC #: SP-AP-0063 (Rev. AA) Page 15 of 31
Byte 18: Control Register 18
Byte 17: Control Register 17
Bit
@Pup
Name
Description
7
0
SMSW_EN
Enable Smooth Switching
0 = Disabled, 1= Enabled
6
0
SMSW_SEL
Smooth switch select
0 = CPU_PLL, 1 = SRC_PLL
5
0
SE1/SE2_BIT0
SE1 and SE2 drive strength Setting 2 of 3(see Byte 18 for more setting)
0 = Low, 1= High
4
0
Prog_PCI-E_EN
Programmable PCI-E frequency enable
0 = Disabled, 1= Enabled
3
0
Prog_CPU_EN
Programmable CPU frequency enable
0 = Disabled, 1= Enabled
2
0
REF_BIT0
REFdrive strength strength Setting 2 of 3(see Byte 18 for more setting)
0 = Low, 1= High
1
0
USB_BIT0
USB drive strength strength Setting 2 of 3(see Byte 18 for more setting)
0 = Low, 1= High
0
0
PCI/ PCIF_BIT0
PCI drive strength strength Setting 2 of 3(see Byte 18 for more setting)
0 = Low, 1= High
7
0
REF_BIT2
Drive Strength Control
6
0
RESERVED
5
1
RESERVED
4
0
RESERVED
3
0
USB_BIT2
2
0
PCI/PCIF_BIT2
1
0
SE1/SE2_BIT2
0
0
RESERVED
BIT_2
(By te18)
BIT_1
(Vario us B ytes )
BIT_0
(Byte 17)
Buffer
Strength
1
1
1
Strongest
11
0
10
1
10
0
01
1
Def ault
01
0
00
1
Table 5. Output Driver Status during PCI-STP# and CPU-STP#
PCI_STP# Asserted
CPU_STP# Asserted
SMBus OE Disabled
Single-ended Clocks
Stoppable
Driven low
Running
Driven low
Non stoppable
Running
Running
Differential Clocks
Stoppable
Clock driven high
Clock driven high
Clock driven Low or 20K
pulldown
Clock# driven low
Clock# driven low
Non stoppable
Running
Running
Table 6. Output Driver Status
All Single-ended Clocks
All Differential Clocks except
CPU1
CPU1
w/o Strap
w/ Strap
Clock
Clock#
Clock
Clock#
Latches Open State
Low
Hi-z
Low or 20K pulldown
Low
Low or 20K pulldown Low
Powerdown
Low
Hi-z
Low or 20K pulldown
Low
Low or 20K pulldown Low
M1
Low
Hi-z
Low or 20K pulldown
Low
Running
Running



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