ics9248-199 Integrated Device Technology, ics9248-199 Datasheet - Page 3

• Manufacturer Part Number: ics9248-199
• Description: Frequency Generator For Sis 735/740 With Amd K7 Processor
• Manufacturer: Integrated Device Technology

General Description
The ICS9248-199 is a single chip clock solution for desktop designs using the Intel Brookdale chipset with PC133
or DDR memory. It provides all necessary clock signals for such a system.
The ICS9248-199 is part of a whole new line of ICS clock generators and buffers called TCH™ (Timing Control Hub).
This part incorporates ICS's newest clock technology which offers more robust features and functionality. Employing
the use of a serially programmable I
setting, the output divider ratios, selecting the ideal spread percentage, the output skew, the output strength, and
enabling/disabling each individual output clock. M/N control can configure output frequency with resolution up to
0.1MHz increment.
Block Diagram
Power Groups
VDDCPU = CPU
VDDPCI = PCICLK_F, PCICLK
VDDSDR = SDRAM
VDD48 = 48MHz, 24MHz, fixed PLL
VDDA = Core, PLL, X1, X2
VDDAGP=AGP, REF
0376E—12/23/02
SDRAM_STOP#
CPU_STOP#
AGP_STOP#
PCI_STOP#
AGP_SEL
FS (4:0)
SDATA
SCLK
PD#
X2
X1
2
C interface, this device can adjust the output clocks by configuring the frequency
XTAL
OSC
Spectrum
PLL2
Spread
Control
Config.
PLL1
Logic
Reg.
3
DIVDER
DIVDER
DIVDER
DIVDER
DIVDER
SDRAM
IOAPIC
CPU
AGP
PCI
/ 2
Stop
Stop
Stop
Stop
5
2
2
ICS9248-199
48MHz
24_48MHz
SDRAM
PCICLK (4:0)
PCICLK_F
AGPCLK (1:0)
IOAPIC
CPUCLK
CPUCLKC0
REF (1:0)
CPUCLKT0