EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 49

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Notes to
(1)
(2)
Altera Corporation-Preliminary
March 2007
Register Chain
Local Interconnect
Direct Link
Interconnect
R4 Interconnect
R24 Interconnect
C4 Interconnect
C16 Interconnect
LE
M9K Memory
Block
Embedded
Multipliers
Column
I/O Element
Row
I/O Element
Table 3–1. Cyclone III Device Routing Scheme
Each C4 interconnect can drive either up or down four rows.
The C16 column interconnects span a length of 16 LABs and provide the fastest resource for long column
connections between LABs, M9K memory blocks, embedded multipliers, and I/O elements. The C16 column
interconnects drive to other row and column interconnects at every fourth LAB. The C16 column interconnects drive
LAB local interconnects via C4 and R4 interconnects and do not drive LAB local interconnects directly. The C16
interconnects can drive R24, R4, C16, and C4 interconnects.
Source
Figure
3–3:
Chain
Reg
v
Local
Device Routing
All embedded blocks communicate with the logic array similar to
LAB-to-LAB interfaces. Each block (for example, M9K memory,
embedded multiplier, or PLL) connects to row and column interconnects
and has local interconnect regions driven by row and column
interconnects. These blocks also have direct link interconnects for fast
connections to and from a neighboring LAB.
Table 3–1
v
v
v
v
v
v
Direct
Link
v
v
v
v
shows the Cyclone III device routing scheme.
R4
v
v
v
v
v
v
v
v
R24
v
v
v
v
v
Destination
C4
v
v
v
v
v
v
v
v
v
C16
Cyclone III Device Handbook, Volume 1
v
v
v
v
v
LE
v
v
Block
RAM
M9K
v
MultiTrack Interconnect
Multi-
Embd
plier
v
Col
IOE
v
Row
IOE
v
3–7