Board-Level Clock Distribution
MSC8113 Reference Manual, Rev. 0
Freescale Semiconductor
7-5
7.2.2 Multi-Master Mode Board-Level Clock Distribution
There are two methods for clock distribution on a circuit board in Multi-Master mode:
CLKOUT
(only recommended for designs migrated from the MSC8102 device)
CLKIN
In the Multi-Master
CLKOUT
distribution method, the MSC8113 devices share slave devices on
the board (SDRAMs for example). The
CLKOUT
of the master MSC8113 device connects through
a zero-delay buffer, to the clock input pins of the shared slave devices on the board. Figure 7-6
illustrates a system in which three MSC8113 devices connect to the one shared SDRAM memory
device on the board.
Note:
Clocks marked with the same number of parallel lines should use an equivalent buffer
and route on the board.
Figure 7-5. MSC8113 Clock Distribution in Single-Master Mode Using CLKIN
Res.
CLKOUT
CLKIN
OSC.
Buffer
Slave
Device
Slave
Device
Slave
Device
NC
Res.
CLKOUT
CLKIN
NC
Res.
CLKOUT
CLKIN
NC
MSC8113
MSC8113
MSC8113
DLLDIS = 1
DLLDIS = 1
DLLDIS = 1
OSC.
Buffer
Содержание MSC8113
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