EP2AGX95EF29C6N Datasheet, PDF (72/380 Pages) Altera Corporation – Device Interfaces and Integration

3–24
Chapter 3: Memory Blocks in Arria II Devices
Design Considerations
Figure 3–24 shows a sample functional waveform of mixed-port read-during-write
behavior for new data mode in MLABs.
Figure 3–24. MLABs Mixed-Port Read-During-Write: New Data Mode
clk_a
wren_a
address_a
data_a
byteena_a
q_b (registered)
A0
A1
AAAA BBBB CCCC DDDD EEEE FFFF
11
XXXX
AAAA BBBB CCCC DDDD EEEE FFFF
Figure 3–25 shows a sample functional waveform of mixed-port read-during-write
behavior for don’t care mode in MLABs.
Figure 3–25. MLABs Mixed-Port Read-During-Write: Don’t Care Mode
clk_a
wraddress
rdaddress
data_in
wrena
byteena_a
q_b(registered)
AAAA
A0
A0
BBBB
CCCC DDDD
A1
A1
EEEE
FFFF
11
01
10
11
01
10
AAAA AABB CCBB DDDD DDEE FFEE
Arria II Device Handbook Volume 1: Device Interfaces and Integration
December 2011 Altera Corporation