ICS951464AGLF Datasheet, PDF (4/24 Pages) Integrated Device Technology – Programmable System Clock Chip for ATI RS/RD690 K8™ - based Systems

ICS951464
IDT^TM/ICST^M Programmable System Clock Chip for ATI RS/RD690 K8^TM - based Systems
General Description
The ICS951464 is a main clock synthesizer chip that provides all clocks required for ATI RS/RD690-based
systems. An SMBus interface allows full control of the device.
Block Diagram
X1
X2
Xtal
Osc.
Fixed PLL
REF(2:0)
48MHz(1:0)
FS(2:0)
CLKREQA#
CLKREQB#
CLKREQC#
RESET_IN#
SMBDAT
SMBCLK
Control
Logic
Programmable
Spread
PLLs
Programmable
Dividers
HTTCLK0
SRCCLK(7:0)
CPUCLK(2:0)
ATIGCLK(2:0)
951464 Power Group Table
VDD Pin#
2
5
14,26
23
36
33
42
46
52
GND Pin#
1
8
15,27
22
37
32
41
45
50
Description
Crsytal, REF VDD & VSS I/O & Core
48M Core and Output; FIX PLL Analog/Digital
SRC I/O & Core
SRC I/O & Core; SRC PLL Digital
SRC I/O & Core; SRC PLL Analog
ATIG I/O & Core; ATIG PLL Analog/Digital
CPU PLL Analog
CPU I/O & Core; CPU PLL Digital
HTT I/O & Core
IDT^TM/ICST^M Programmable System Clock Chip for ATI RS/RD690 K8^TM - based Systems
4
1211B—09/17/09