GA1086MC500 Просмотр технического описания (PDF) - TriQuint Semiconductor

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GA1086MC500

11-Output Clock Buffer

TriQuint Semiconductor 

GA1086

Multi-Processor Systems

The GA1086 can be effectively used to distribute clocks

in RISC- or CISC-processor-based systems. Its 10

outputs support both single- and multi-processor

systems. Following are three representative

configurations which show how the 10 outputs can be

used to synchronize the operation of CPU cache and

memory banks operating at different speeds.

Figure 4 depicts a 2-CPU system in which the

processors and associated peripherals are operating at

66 MHz. Each of the nine outputs operating at 66 MHz

are fully utilized to drive the appropriate CPU, cache,

and memory control logic. The 33 MHz output is used

to synchronize the operation of the slower memory

bank to the rest of the system.

Figure 4. Clocking a Dual-CPU System

R

SYSTEM

CLOCK

LOW

HIGH

HIGH

FBIN

FBOUT

R

CLK

Q1

R

Q2

R

Q3

R

Q4

R

GA1086 Q5

R

Q6

R

Q7

R

S2

Q8

R

S1

Q9

R

S0

Q/2

CPU 1

CACHE

MEMORY

CONTROL

LOGIC

(66 MHZ)

CPU 2

CACHE

SLOW

MEMORY

CONTROL

LOGIC

(33 MHZ)

4

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