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23 PFC_DDD_v1.3.doc
The frequency of operation will depend on the revision of silicon used and the required application.
Consult Motorola Ltd for the latest operating frequency characteristics of the MSC8101 and
MSC8102.
Note that to ensure synchronous operation the following layout constraints are placed:
•
The MSC8102 CLKIN_D[1:5] are of equal length
•
The MSC8101 derived clocks: FPGA_CK, SDRAMCKA, A_DLLIN, HCK_D[1:5]
are of equal length.
•
On the MSC8102s the signals D1_DLLINx, SDRMCKx are of equal length
MSC8101
MSC8102
#1
MSC8102
#3
MSC8102
#2
MSC8102
#4
MSC8102
#5
SDRAM
SDRAMCKA
FPGA_CK
CLKIN
CLKOUT
FPGA
A_DLLIN
HCK_D2
HCK_D5
HCK_D1
HCK_D4
HCK_D3
MSC8101
Oscillator
Figure 14. MSC8101 Aggregator Clocking Scheme
MSC8102
#1
SDRAM
ICS9112-16
DLLIN
CLKOUT
CLKIN_D2
CLKIN_D5
CLKIN_D1
CLKIN_D4
CLKIN_D3
MSC8102
Oscillator.
MSC8102
#2
SDRAM
MSC8102
#3
SDRAM
MSC8102
#4
SDRAM
MSC8102
#5
SDRAM
SDRAMCK
Figure 15. MSC8102 and SDRAM Clocking