Programmable Timing Control Hub
Description
954204 Datasheet
Programmable Timing Control Hub™ for Mobile P4™ Systems
Recommended Application: CK410M Compliant Main Clock with Integrated LCD Spread Spectrum Clock.
Output Features: • 2 - 0.
7V current-mode differential CPU pairs • 5 - 0.
7V current-mode differential SRC pair for SATA and
PCI-E • 1 - 0.
7V current-mode differential CPU/SRC selectable
pair • 4 - PCI (33MHz) • 2 - PCICLK_F, (33MHz) free-running • 1 - USB, 48MHz • 1 - DOT, 96MHz, 0.
7V current differential pair • 1 - REF, 14.
318MHz • 1 - 0.
7V current-mode differential LCD/SRC selectable
pair.
• PCI outputs cycle-cycle jitter < 500ps • +/- 300ppm frequency accuracy on CPU & SRC clocks • +/- 100ppm frequency accuracy on USB clocks Features/Benefits: • Supports tight ppm accuracy clocks for Serial-ATA and
SRC • Supports programmable spread percentage and
frequency
• Uses external 14.
318MHz crystal, external crystal load caps are required for frequency tuning
• Supports undriven differential CPU, SRC pair in PD# for power management.
• CLKREQ pins to support SRC power management.
Key Specifications: • CPU outputs cycle-cycle jitter < 85ps • SRC outputs cycle-cycle jitter < 125ps
Pin Configuration
Functionality
VDDPCI 1 GND 2
PCICLK3 3 PCICLK4 4 PCICLK5 5
GND 6 VDDPCI 7 ITP_EN/PCICLK_F0 8 *SELSRC_LCDCLK#/PCICLK_F1 9 Vtt_PwrGd#/PD 10 VDD48 11 FSLA/USB_48MHz 12
GND 13 DOTT_96MHz 14 DOTC_96MHz 15 FSLB/TEST_MODE 16 LCDCLK_SST/SRCCLKT0 17 LCDCLK_SSC/SRCCLKC0 18
SRCCLKT1 19 SRCCLKC1 20
VDDSRC 21 SRCCLKT2 22 SRCCLKC2 23 SRCCLKT3 24 SRCCLKC3 25 SRCCLKT4_SATA 26 SRCCLKC4_SATA 27
VDDSRC 28
ICS954204
56 PCICLK2 55 PCI/SRC_STOP#
CPU SRC PCI FS_C FS_B FS_A MHz MHz MHz
REF MHz
USB MHz
DOT MHz
54 CPU_STOP#
0
0
0 266.
67 100.
00 33.
33 14.
318 48.
00
96.
00
53 FSLC/TEST_SEL 52 REFOUT 51 GND 50 X1 49 X2 48 VDDREF 47 SDATA 46 SCLK
0
0
1 133.
33 100.
00 33.
33 14.
318 48.
00
96.
00
0
1
0 200.
00 100.
00 33.
33 14.
318 48.
00
96.
00
0
1
1 166.
67 100.
00 33.
33 14.
318 48.
00
96.
00
1
0
0 333.
33 100.
00 33.
33 14.
318 4...
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