EP4CE55F23C8 Altera, EP4CE55F23C8 Datasheet - Page 41

• Manufacturer Part Number: EP4CE55F23C8
• Description: IC CYCLONE IV FPGA 55K 484FBGA
• Manufacturer: Altera
• Series: CYCLONE® IV Er

Specifications of EP4CE55F23C8

• Number Of Logic Elements/cells: 55856
• Number Of Labs/clbs: 3491
• Total Ram Bits: 2340000
• Number Of I /o: 324
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: 0°C ~ 85°C
• Package / Case: 484-FBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Number Of Gates: -

Chapter 3: Memory Blocks in Cyclone IV Devices
Overview
© November 2009 Altera Corporation
Figure 3–2. Cyclone IV Devices Address Clock Enable Block Diagram
The address clock enable is typically used to improve the effectiveness of cache
memory applications during a cache-miss. The default value for the address clock
enable signals is low.
Figure 3–3
write cycles, respectively.
Figure 3–3. Cyclone IV Devices Address Clock Enable During Read Cycle Waveform
latched address
(inside memory)
addressstall
q (asynch)
rdaddress
q (synch)
inclock
and
rden
Figure 3–4
doutn-1
doutn
addressstall
an
address[N]
address[0]
a0
clock
doutn
show the address clock enable waveform during read and
a0
dout0
a1
dout0
dout1
a2
address[N]
address[0]
register
register
dout1
a1
dout1
a3
dout1
dout1
Cyclone IV Device Handbook, Volume 1
address[0]
address[N]
a4
dout1
a4
dout4
a5
dout4
a5
dout5
a6
3–5