ICS932S825 Datasheet, PDF (4/20 Pages) Integrated Circuit Systems – Low Power Clock Chip for Serverworks HT2400 Servers

ICS932S825
General Description
The ICS932S825 is a main clock synthesizer chip that all clocks required by Serverworks HT2400-based servers.
An SMBus interface allows full control of the device.
Block Diagram
X1
XTAL
X2
OSC.
FS(2:0)
CKPWRGD/PD#
SPREAD_EN
SDATA
SCLK
CONTROL
LOGIC
FIXED PLL
25MHz PLL
CPU/SRC/
PCI PLL
25M
DIV
CPU
DIV
PCI33
DIV
SRC
DIV
REF (2:1), REF 0_RUN
48MHz(1:0)
25MHz(1:0)
CPUK8G(6:0)
PCICLK(1:0)
PCIe(6:0)
Single-ended Terminations (All Single-Ended Outputs)
Single-ended
Number of Series Resistor for Proper Termination
Output Strength Loads on Board
Zo = 50 ohms
1 Load
1
33
2 Load
1
39
(Default)
2
22
Differential Terminations
Differential
Number of Series Resistor for Proper Termination
Output
Loads on Board
Zo = 50 ohms
CPUK8Gx
1
33
PCIe_Lx
1
33
1276D—10/25/07
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