ep1m120 Altera Corporation, ep1m120 Datasheet - Page 36

• Manufacturer Part Number: ep1m120
• Description: Programmable Logic Device Family
• Manufacturer: Altera Corporation

Mercury Programmable Logic Device Family Data Sheet
36
Figure 18. RAM Memory Port Configurations
Note to
(1)
The ESB also allows variable width data ports for reading and writing to
any of the RAM ports in any RAM configuration. For example, the ESB in
quad port configuration can be written in 1 mode at port A, read in 16
from port A, written in 4 mode at port B, and read in 2 mode from
port B.
Two dual- or single-port memory blocks can be implemented in a single ESB.
True Dual-Port Memory
Dual-Port Memory (1)
Single-Port Memory (1)
Figure
18:
data
address
wren
clocken
q
aclr
data[ ]
wraddress[ ]
wren
inclocken
inaclr
data[ ]
address[ ]
wren
inclocken
inaclr
A
clock
inclock
inclock
[ ]
A
A
A
[ ]
A
A
A
[ ]
A
rdaddress[ ]
B
outclocken
outclocken
address
outclock
outclock
clocken
clock
data
outaclr
outaclr
wren
aclr
rden
q
B
q[ ]
q[ ]
B
B
B
[ ]
[ ]
[ ]
B
B
B
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