PM7311 pmc-sierra, PM7311 Datasheet - Page 85

• Manufacturer Part Number: PM7311
• Description: Freedm 84a1024l Assp Telecom Standard Datasheet
• Manufacturer: pmc-sierra

Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2021832, Issue 2
10.9.11
functions that reside in the CB_DRAMC. Figure 29 shows the configuration for the external
SDRAMs that comprise the Chunk Buffer.
RS_DRAMC
The RS_DRAMC controls access to/from the Re-sequencing SDRAM interface present on
FREEDM 84A1024L. The external SDRAMS provide CI lookup information as well as pointers
used in the resequencing operation. The RS_DRAMC block supports a 32 bit wide SDRAM
interface operating at 100 MHz. Refresh, bank switching, providing precharge and bus
management are functions that reside in the RS_DRAMC. Figure 30 shows the configuration for
the external SDRAMs that comprise the Re-Sequencing buffer.
Figure 29 DRAM Configuration for the Chunk Buffer Interface
FREEDM336A1024
(100 MHz)
SYSCLK
CBADD[12:0]
CBDAT[47:0]
CBBS[1:0]
CBRASB
CBCASB
SYSCLK
CBWEB
CBCSB
FREEDM 84A1024L ASSP Telecom Standard Product Data Sheet
"1"
"1"
"1"
CBCSB
CBRASB
CBCASB
CBWEB
CBBS[1:0]
CBADD[12:0]
CBDAT[15:0]
CKE
SYSCLK
CBCSB
CBRASB
CBCASB
CBWEB
CBBS[1:0]
CBADD[12:0]
CBDAT[15:0]
CKE
SYSCLK
CBCSB
CBRASB
CBCASB
CBWEB
CBBS[1:0]
CBADD[12:0]
CBDAT[15:0]
CKE
SYSCLK
Released
SDRAM A
SDRAM B
SDRAM C
256 Mbit
256 Mbit
256 Mbit
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