参数资料
型号: EP1C6T324I8ES
厂商: Altera Corporation
英文描述: Cyclone FPGA Family Data Sheet
中文描述: 气旋的FPGA系列数据手册
文件页数: 49/104页
文件大小: 763K
代理商: EP1C6T324I8ES
Altera Corporation
January 2007
2–43
Preliminary
I/O Structure
The pin's datain signals can drive the logic array. The logic array drives
the control and data signals, providing a flexible routing resource. The
row or column IOE clocks,
io_clk[5..0]
, provide a dedicated routing
resource for low-skew, high-speed clocks. The global clock network
generates the IOE clocks that feed the row or column I/O regions (see
“Global Clock Network & Phase-Locked Loops” on page 2–29
).
Figure 2–30
illustrates the signal paths through the I/O block.
Figure 2–30. Signal Path through the I/O Block
Each IOE contains its own control signal selection for the following
control signals:
oe
,
ce_in
,
ce_out
,
aclr
/
preset
,
sclr
/
preset
,
clk_in
, and
clk_out
.
Figure 2–31
illustrates the control signal
selection.
Row or Column
io_clk[5..0]
io_datain
comb_io_datain
io_dataout
io_coe
oe
ce_in
ce_out
io_cce_in
aclr/preset
io_cce_out
sclr
io_caclr
clk_in
io_cclk
clk_out
dataout
Data and
Control
Signal
Selection
IOE
To Logic
Array
From Logic
Array
To Other
IOEs
io_csclr
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