I/O Structure
Figure 2–60. Row I/O Block Connection to the Interconnect
R4, R8 & R24
C4, C8 & C16
I/O Interconnect
Interconnects
Interconnects
I/O Block Local
Interconnect
16 Control Signals
from I/O Interconnect (1)
16
28 Data & Control
Signals from
Logic Array (2)
28
LAB
Horizontal
I/O Block
io_dataouta[3..0]
io_dataoutb[3..0]
Direct Link
Direct Link
Interconnect
Interconnect
to Adjacent LAB
to Adjacent LAB
Horizontal I/O
Block Contains
up to Four IOEs
io_clk[7:0]
LAB Local
Interconnect
Notes to Figure 2–60:
(1) The 16 control signals are composed of four output enables io_boe[3..0], four clock enables io_bce[3..0],
four clocks io_clk[3..0], and four clear signals io_bclr[3..0].
(2) The 28 data and control signals consist of eight data out lines: four lines each for DDR applications
io_dataouta[3..0]and io_dataoutb[3..0], four output enables io_coe[3..0], four input clock enables
io_cce_in[3..0], four output clock enables io_cce_out[3..0], four clocks io_cclk[3..0], and four clear
signals io_cclr[3..0].
2–106
Altera Corporation
July 2005
Stratix Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
