EP4CGX150CF23I7N Altera, EP4CGX150CF23I7N Datasheet - Page 53

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EP4CGX150CF23I7N

Manufacturer Part Number
EP4CGX150CF23I7N
Description
IC CYCLONE IV FPGA 150K 484FBGA
Manufacturer
Altera
Series
CYCLONE® IV GXr

Specifications of EP4CGX150CF23I7N

Number Of Logic Elements/cells
149760
Number Of Labs/clbs
9360
Total Ram Bits
6480000
Number Of I /o
270
Voltage - Supply
1.16 V ~ 1.24 V
Mounting Type
Surface Mount
Operating Temperature
-40°C ~ 100°C
Package / Case
484-FBGA
Family Name
Cyclone IV
Number Of Logic Blocks/elements
149760
# I/os (max)
270
Operating Supply Voltage (typ)
1.2V
Logic Cells
149760
Ram Bits
6635520
Operating Supply Voltage (min)
1.16V
Operating Supply Voltage (max)
1.24V
Operating Temp Range
-40C to 100C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
484
Package Type
FBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of Gates
-
Lead Free Status / Rohs Status
Compliant

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Chapter 3: Memory Blocks in Cyclone IV Devices
Design Considerations
Conflict Resolution
© November 2009 Altera Corporation
f
1
Mixed-Port Read-During-Write Mode
This mode applies to a RAM in simple or true dual-port mode, which has one port
reading and the other port writing to the same address location with the same clock.
In this mode, you also have two output choices: Old Data mode or Don't Care mode.
In Old Data mode, a read-during-write operation to different ports causes the RAM
outputs to reflect the old data at that address location. In Don't Care mode, the same
operation results in a “Don't Care” or unknown value on the RAM outputs.
For more information about how to implement the desired behavior, refer to the
Megafunction User
Figure 3–16
behavior for Old Data mode. In Don't Care mode, the old data is replaced with
“Don't Care”.
Figure 3–16. Mixed Port Read-During-Write: Old Data Mode
For mixed-port read-during-write operation with dual clocks, the relationship
between the clocks determines the output behavior of the memory. If you use the
same clock for the two clocks, the output is the old data from the address location.
However, if you use different clocks, the output is unknown during the mixed-port
read-during-write operation. This unknown value may be the old or new data at the
address location, depending on whether the read happens before or after the write.
When you are using M9K memory blocks in true dual-port mode, it is possible to
attempt two write operations to the same memory location (address). Because there is
no conflict resolution circuitry built into M9K memory blocks, this results in
unknown data being written to that location. Therefore, you must implement
conflict-resolution logic external to the M9K memory block.
q_b (asynch)
address_b
address_a
clk_a&b
wren_a
rden_b
data_a
shows a sample functional waveform of mixed port read-during-write
Guide.
A
a (old data)
a
a
B
A
C
B
D
b (old data)
Cyclone IV Device Handbook, Volume 1
E
b
b
D
F
E
RAM
3–17

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