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ICS951413 Datasheet(PDF) 1 Page - Integrated Circuit Systems

Part No. ICS951413
Description  Programmable System Clock Chip for ATI RS400 P4-based Systems
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Maker  ICST [Integrated Circuit Systems]
Homepage  http://www.icst.com
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ICS951413 Datasheet(HTML) 1 Page - Integrated Circuit Systems

 
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Integrated
Circuit
Systems, Inc.
ICS951413
0929C—03/07/05
Pin Configuration
Recommended Application:
ATI RS400 systems using Intel P4
TM processors
Output Features:
6 - Pairs of SRC/PCI Express* clocks
2 - Pairs of programmable SRC/PCI Express (ATIG)
clocks
3 - Pairs of Intel P4 clocks
3 - 14.318 MHz REF clocks
1 - 48MHz USB clock
1 - 33 MHz PCI clock seed
Key Specifications:
CPU outputs cycle-cycle jitter < 85ps
SRC output cycle-cycle jitter <125ps
PCI outputs cycle-cycle jitter < 250ps
+/- 300ppm frequency accuracy on CPU & SRC clocks
Programmable System Clock Chip for ATI RS400 P4TM-based Systems
Features/Benefits:
2 - Programmable Clock Request pins for SRC clocks
Supports CK410 or CK409 frequency table mapping
Spread Spectrum for EMI reduction
Outputs may be disabled via SMBus
External crystal load capacitors for maximum
frequency accuracy
56-pin SSOP & TSSOP
X1 1
56 VDDREF
X2 2
55 GND
VDD48 3
54 **FS_A/REF0
USB_48MHz 4
53 **FS_B/REF1
GND 5
52 **TEST_SEL/REF2
VTT_PWRGD#/PD 6
51 VDDPCI
SCLK 7
50 **CK410#/PCICLK0
SDATA 8
49 GNDPCI
**FS_C 9
48 *CPU_STOP#
**CLKREQA# 10
47 CPUCLKT0
**CLKREQB# 11
46 CPUCLKC0
SRCCLKT7 12
45 VDDCPU
SRCCLKC7 13
44 GNDCPU
VDDSRC 14
43 CPUCLKT1
GNDSRC 15
42 CPUCLKC1
SRCCLKT6 16
41 CPUCLKT2_ITP
SRCCLKC6 17
40 CPUCLKC2_ITP
SRCCLKT5 18
39 VDDA
SRCCLKC5 19
38 GNDA
GNDSRC 20
37 IREF
VDDSRC 21
36 GNDSRC
SRCCLKT4 22
35 VDDSRC
SRCCLKC4 23
34 SRCCLKT0
SRCCLKT3 24
33 SRCCLKC0
SRCCLKC3 25
32 VDDATI
GNDSRC 26
31 GNDATI
ATIGCLKT127
30ATIGCLKT0
ATIGCLKC128
29ATIGCLKC0
Note: Pins preceeded by '**' have a 120 Kohm Internal Pull Down resistor
Pins preceeded by '*' have a 120 Kohm Internal Pull Up resistor
Functionality - (CK410# = 0)
FS_C
1 FS_B1 FS_A1
CPU
MHz
SRC
MHz
PCI
MHz
REF
MHz
USB
MHz
0
266.66 100.00 33.33 14.318 48.000
1
133.33 100.00 33.33 14.318 48.000
0
200.00 100.00 33.33 14.318 48.000
1
166.66 100.00 33.33 14.318 48.000
0
333.33 100.00 33.33 14.318 48.000
1
100.00 100.00 33.33 14.318 48.000
0
400.00 100.00 33.33 14.318 48.000
1
14.318 48.000
Functionality - (CK410# = 1)
FS_C
1
Byte6
bit5
FS_B
1 FS_A1
CPU
MHz
SRC
MHz
PCI
MHz
REF
MHz
USB
MHz
0
0
100.00 100.00 33.33 14.318 48.000
1
0
200.00 100.00 33.33 14.318 48.000
0
1
133.33 100.00 33.33 14.318 48.000
1
1
166.67 100.00 33.33 14.318 48.000
0
0
200.00 100.00 33.33 14.318 48.000
1
0
400.00 100.00 33.33 14.318 48.000
0
1
266.67 100.00 33.33 14.318 48.000
1
1
333.33 100.00 33.33 14.318 48.000
1. FS_C, FS_B and FS_A are low-threshold inputs. Please see the VIL_FS and VIH_FS
specifications in the Input/Supply/Common Output Parameters Table for correct values.
RESERVED
1
0
0
1
0
0
1
1
*Other names and brands may be claimed as the property of others.


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