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Integrated Device Technology Electronic Components Datasheet



ICS9LPRS525

56-pin CK505



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DATASHEET
56-pin CK505 for Intel Systems
ICS9LPRS525
Recommended Application:
56-pin CK505 compatible clock, w/fully integrated Vreg and series
resistors on differential outputs
Output Features:
• 2 - CPU differential low power push-pull pairs
• 7 - SRC differential push-pull pairs
• 1 - CPU/SRC selectable differential low power push-pull pair
• 1 - SRC/DOT selectable differential low power push-pull pair
• 1 - SRC/SE selectable differential push-pull pair/Single-ended
outputs
• 5 - PCI, 33MHz
• 1 - USB, 48MHz
• 1 - REF, 14.318MHz
Key Specifications:
• CPU outputs cycle-cycle jitter < 85ps
• SRC output cycle-cycle jitter < 125ps
• PCI outputs cycle-cycle jitter < 250ps
• +/- 100ppm frequency accuracy on all outputs
• SRC outputs meet PCIe Gen2 when sourced from PLL3
Features/Benefits:
• Supports spread spectrum modulation, 0 to -0.5% down
spread
• Supports CPU clks up to 400MHz
• Uses external 14.318MHz crystal, external crystal load
caps are required for frequency tuning
Table 1: CPU Frequency Select Table
FSLC2
B0b7
0
0
0
0
1
1
1
1
FSLB1
B0b6
0
0
1
1
0
0
1
1
FSLA1
B0b5
0
1
0
1
0
1
0
1
CPU
MHz
266.66
133.33
200.00
166.66
333.33
100.00
400.00
SRC PCI REF USB DOT
MHz MHz MHz MHz MHz
100.00 33.33 14.318 48.00 96.00
Reserved
1. FSLA and FSLB are low-threshold inputs.Please see VIL_FS and VIH_FS specifications in
the Input/Supply/Common Output Parameters Table for correct values.
Also refer to the Test Clarification Table.
2. FSLC is a three-level input. Please see the VIL_FS and VIH_FS
specifications in the Input/Supply/Common Output Parameters Table for correct values.
Pin Configuration
PCI0/CR#_A 1
56 SCLK
VDDPCI 2
PCI1/CR#_B 3
PCI2/TME 4
PCI3/CFG0 5
PCI4/SRC5_EN 6
PCI_F5/ITP_EN 7
GNDPCI 8
VDD48 9
USB_48MHz/FSLA 10
GND48 11
VDD96IO 12
DOTT_96_LRS/SRCT0_LRS 13
DOTC_96_LRS/SRCC0_LRS 14
GND 15
VDD 16
SRCT1_LRS/SE1 17
SRCC1_LRS/SE2 18
GND 19
VDDPLL3IO 20
SRCT2_LRS/SATAT_LRS 21
SRCC2_LRS/SATAC_LRS 22
GNDSRC 23
SRCT3_LRS/CR#_C 24
SRCC3_LRS/CR#_D 25
VDDSRCIO 26
SRCT4_LRS 27
SRCC4_LRS 28
55 SDATA
54 REF0/FSLC/TEST_SEL
53 VDDREF
52 X1
51 X2
50 GNDREF
49 FSLB/TEST_MODE
48 CK_PWRGD/PD#
47 VDDCPU
46 CPUT0_LRS
45 CPUC0_LRS
44 GNDCPU
43 CPUT1_F_LRS
42 CPUC1_F_LRS
41 VDDCPUIO
40 NC
39 CPUT2_ITP_LRS/SRCT8_LRS
38 CPUC2_ITP_LRS/SRCC8_LRS
37 VDDSRCIO
36 SRCT7_LRS/CR#_F
35 SRCC7_LRS/CR#_E
34 GNDSRC
33 SRCT6_LRS
32 SRCC6_LRS
31 VDDSRC
30 PCI_STOP#/SRCT5_LRS
29 CPU_STOP#/SRCC5_LRS
56-SSOP & TSSOP
IDTTM/ICSTM PC MAIN CLOCK
1
1484A—04/28/09



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ICS9LPRS525 pdf
ICS9LPRS525
PC MAIN CLOCK
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Pin Description
PIN #
PIN NAME
1 PCI0/CR#_A
2 VDDPCI
3 PCI1/CR#_B
4 PCI2/TME
5 PCI3/CFG0
6 PCI4/SRC5_EN
7 PCI_F5/ITP_EN
8 GNDPCI
9 VDD48
10 USB_48MHz/FSLA
11 GND48
12 VDD96IO
13 DOTT_96_LRS/SRCT0_LRS
14 DOTC_96_LRS/SRCC0_LRS
15 GND
16 VDD
17 SRCT1_LRS/SE1
18 SRCC1_LRS/SE2
19 GND
20 VDDPLL3IO
21 SRCT2_LRS/SATAT_LRS
22 SRCC2_LRS/SATAC_LRS
23 GNDSRC
24 SRCT3_LRS/CR#_C
TYPE
I/O
PWR
I/O
I/O
I/O
I/O
I/O
PWR
PWR
I/O
PWR
PWR
OUT
OUT
PWR
PWR
OUT
OUT
PWR
PWR
OUT
OUT
PWR
I/O
DESCRIPTION
3.3V PCI clock output or Clock Request control A for either SRC0 or SRC2 pair
The power-up default is PCI0 output, but this pin may also be used as a Clock Request control of SRC pair 0 or SRC pair 2 via SMBus. Before
configuring this pin as a Clock Request Pin, the PCI output must first be disabled in byte 2, bit 0 of SMBus address space . After the PCI output is
disabled (high-Z), the pin can then be set to serve as a Clock Request pin for either SRC pair 2 or pair 0 using the CRA#_EN bit located in byte 5 of
SMBUs address space.
Byte 5, bit 7
0 = PCI0 enabled (default)
1= CRA# enabled. Byte 5, bit 6 controls whether CRA# controls SRC0 or SRC2 pair
Byte 5, bit 6
0 = CRA# controls SRC0 pair (default),
1= CRA# controls SRC2 pair
Power supply for PCI clocks, nominal 3.3V
3.3V PCI clock output/Clock Request control B for either SRC1 or SRC4 pair
The power-up default is PCI1 output, but this pin may also be used as a Clock Request control of SRC pair 1 or SRC pair 4 via SMBus. Before
configuring this pin as a Clock Request Pin, the PCI output must first be disabled in byte 2, bit 1 of SMBus address space . After the PCI output is
disabled (high-Z), the pin can then be set to serve as a Clock Request pin for either SRC pair 1 or pair 4 using the CRB#_EN bit located in byte 5 of
SMBUs address space.
Byte 5, bit 5
0 = PCI1 enabled (default)
1= CRB# enabled. Byte 5, bit 6 controls whether CRB# controls SRC1 or SRC4 pair
Byte 5, bit 4
0 = CRB# controls SRC1 pair (default)
1= CRB# controls SRC4 pair
3.3V PCI clock output / Trusted Mode Enable(TME) Latched Input. This pin is sampled on power-up as follows
0=Overclocking of CPU and SRC allowed
1=Overclocking of CPU and SRC NOT allowed
After being sampled on power-up, this pin becomes a 3.3V PCI Output
3.3V PCI clock output/Configuration Strap. See PCI3 Configuration Table for more information
3.3V PCI clock output / SRC5 pair or PCI_STOP#/CPU_STOP# enable strap. On powerup, the logic value on this pin determines if the SRC5 pair is
enabled or if CPU_STOP#/PCI_STOP# is enabled (pins 29 and 30). The latched value controls the pin function on pins 29 and 30 as follows
0 = PCI_STOP#/CPU_STOP#
1 = SRC5/SRC5#
Free running PCI clock output and ITP/SRC8 enable strap. This output is not affected by the state of the PCI_STOP# pin. On powerup, the state of
this pin determines whether pins 38 and 39 are an ITP or SRC pair.
0 =SRC8/SRC8#
1 = ITP/ITP#
Ground pin for the PCI outputs
Power pin for the 48MHz output and PLL.3.3V
3.3V tolerant input for CPU frequency selection. Refer to input electrical characteristics for Vil_FS and Vih_FS values. / Fixed 48MHz USB clock
output. 3.3V.
Ground pin for the 48MHz outputs
Power supply for DOT96 outputs, 1.05V to 3.3V.
True clock of low power differential SRC or DOT96 with integrated 33 ohm Rs. The power-up default function is SRC0. After powerup, this pin function
may be changed to DOT96 via SMBus Byte 1, bit 7 as follows:
0= SRC0
1=DOT96
Complement clock of low power differential SRC or DOT96 with integrated 33 ohm Rs. The power-up default function is SRC0#. After powerup, this
pin function may be changed to DOT96# via SMBus Byte 1, bit 7 as follows
0= SRC0#
1=DOT96#
Ground pin.
Power supply, nominal 3.3V
True clock of low power differential SRC1 clock pair with integrated 33 ohm Rs. / 3.3V single-ended output. The powerup default is 100 MHz SRC, -
0.5% downspread. The pin function may be changed via SMBus B1b[4:1]
Complement clock of low powerl differential SRC1 clock pair with integrated 33 ohm Rs / 3.3V single-ended output. The powerup default is 100 MHz
SRC, -0.5% downspread. The pin function may be changed via SMBus B1b[4:1]
Ground pin.
Power supply for PLL3 outputs. 1.05V to 3.3V.
True clock of low power differentiall SRC/SATA clock pair with integrated Rs.
Complement clock of low power differential push-pull SRC/SATA clock pair with integrated 33 ohm Rs.
Ground pin for the SRC outputs
True clock of low power differential SRC clock pair with integrated 33 ohm Rs./ Clock Request control C for either SRC0 or SRC2 pair. The power-up
default is SRCCLK3 output, but this pin may also be used as a Clock Request control of SRC pair 0 or SRC pair 2 via SMBus. Before configuring this
pin as a Clock Request Pin, the SRC output must first be disabled in byte 4, bit 7 of SMBus address space . After the SRC output is disabled, the pin
can then be set to serve as a Clock Request pin for either SRC pair 2 or pair 0 using the CRC#_EN bit located in byte 5 of SMBUs address space.
Byte 5, bit 3
0 = SRCCLK3 enabled (default)
1= CRC# enabled. Byte 5, bit 2 controls whether CRC# controls SRC0 or SRC2 pair
Byte 5, bit 2
0 = CRC# controls SRC0 pair (default),
1= CRC# controls SRC2 pair
IDTTM/ICSTM PC MAIN CLOCK
2
1484A—04/28/09



Part Number ICS9LPRS525
Description 56-pin CK505
Maker Integrated Device Technology - Integrated Device Technology
Total Page 21 Pages
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