ep20k1000e Altera Corporation, ep20k1000e Datasheet - Page 29

• Manufacturer Part Number: ep20k1000e
• Description: Programmable Logic Device Family
• Manufacturer: Altera Corporation

Altera Corporation
Figure 16. APEX 20K Parallel Expanders
Embedded
System Block
Local Interconnect
32 Signals from
The ESB can implement various types of memory blocks, including
dual-port RAM, ROM, FIFO, and CAM blocks. The ESB includes input
and output registers; the input registers synchronize writes, and the
output registers can pipeline designs to improve system performance. The
ESB offers a dual-port mode, which supports simultaneous reads and
writes at two different clock frequencies.
diagram.
Figure 17. ESB Block Diagram
Product-
Product-
Select
Select
Matrix
Matrix
Term
Term
APEX 20K Programmable Logic Device Family Data Sheet
wraddress[]
data[]
wren
inclock
inclocken
inaclr
Parallel
Expander Switch
Parallel
Expander Switch
Macrocell
Previous
From
Macrocell
Figure 17
To Next
rdaddress[]
outclocken
outclock
outaclr
rden
shows the ESB block
q[]
Macrocell
Product-
Term Logic
Macrocell
Product-
Term Logic
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