ICS951413 Datasheet, PDF (4/23 Pages) Integrated Circuit Systems – Programmable System Clock Chip for ATI RS400 P4-based Systems

Integrated
Circuit
Systems, Inc.
ICS951413
General Description
ICS951413 provides a single-chip clocking solution for the ATI RS400-based systems using the latest Intel P4 processors.
ICS951413 is driven with a 14.318MHz crystal. It generates CPU outputs up to 400MHz and also provides highly accurate
SRC clocks for PCI-Express support. Two Clock Request pins are provided for Express-Card^TM support. Two of the SRC
outputs (ATIGCLK(1:0)) are frequency programmable.
Block Diagram
X1
X2
XTAL
OSC.
FIXED PLL
REF(2:0)
USB_48MHz
CK410#
FS_(C:A)
CLKREQA#
CLKREQB#
CPU_STOP#
VTT_PWRGD#/PD
SDATA
SCLK
CONTROL
LOGIC
CPU PLL
SRC PLL
PCI33
DIV
CPU
DIV
SRC
DIV2
/8/7/6/5
SRC
DIV1
PCICLK0
CPUCLK(2:0)
ATIGCLK(1:0)
SRCCLK(7:3,0)
IREF
Power Groups
Pin Number
VDD
GND
56
55
51
49
45
44
14, 21, 35 15, 20, 26, 36
32
31
39
38
3
5
0929C—03/07/05
Description
Xtal, REF
PCICLK output
CPUCLK Outputs
SRCCLK outputs
ATIGCLK outputs
Analog, CPU PLL
USB_48MHz output
4