EP3C16F484A7N Altera, EP3C16F484A7N Datasheet - Page 43

• Manufacturer Part Number: EP3C16F484A7N
• Description: Cyclone III
• Manufacturer: Altera

Specifications of EP3C16F484A7N

• Family Name: Cyclone III
• Number Of Logic Blocks/elements: 15408
• # I/os (max): 346
• Frequency (max): 437.5MHz
• Process Technology: 65nm
• Operating Supply Voltage (typ): 1.2V
• Logic Cells: 15408
• Ram Bits: 516096
• Operating Supply Voltage (min): 1.15V
• Operating Supply Voltage (max): 1.25V
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 484
• Package Type: FBGA
• Lead Free Status / Rohs Status: Compliant

Chapter 3: Memory Blocks in the Cyclone III Device Family
Overview
Mixed-Width Support
Asynchronous Clear
© December 2009
1
Altera Corporation
Figure 3–5. Cyclone III Device Family Address Clock Enable During Write Cycle Waveform
M9K memory blocks support mixed data widths. When using simple dual-port, true
dual-port, or FIFO modes, mixed width support allows you to read and write
different data widths to an M9K memory block. For more information about the
different widths supported per memory mode, refer to
page
The Cyclone III device family supports asynchronous clears for read address
registers, output registers, and output latches only. Input registers other than read
address registers are not supported. When applied to output registers, the
asynchronous clear signal clears the output registers and the effects are immediately
seen. If your RAM does not use output registers, you can still clear the RAM outputs
using the output latch asynchronous clear feature.
Asserting asynchronous clear to the read address register during a read operation
might corrupt the memory content.
Figure 3–6
Figure 3–6. Output Latch Asynchronous Clear Waveform
aclr at latch
latched address
(inside memory)
3–8.
contents at a0
contents at a1
contents at a2
contents at a3
contents at a4
contents at a5
addressstall
wraddress
aclr
clk
q
shows the functional waveform for the asynchronous clear feature.
inclock
wren
data
an
XX
a0
00
a1
XX
a0
01
a1
a2
XX
01
02
a2
XX
XX
XX
a1
02
a3
03
00
“Memory Modes” on
Cyclone III Device Handbook, Volume 1
04
a4
a0
a4
03
a5
05
a1
04
a5
05
a6
06
3–7