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: 50/104页
文件大小: 763K
代理商: EP1C6T324I8ES
2–44
Preliminary
Altera Corporation
January 2007
Cyclone Device Handbook, Volume 1
Figure 2–31. Control Signal Selection per IOE
In normal bidirectional operation, you can use the input register for input
data requiring fast setup times. The input register can have its own clock
input and clock enable separate from the OE and output registers. The
output register can be used for data requiring fast clock-to-output
performance. The OE register is available for fast clock-to-output enable
timing. The OE and output register share the same clock source and the
same clock enable source from the local interconnect in the associated
LAB, dedicated I/O clocks, or the column and row interconnects.
Figure 2–32
shows the IOE in bidirectional configuration.
clk_out
ce_in
clk_in
ce_out
aclr/preset
sclr/preset
Dedicated I/O
Clock [5..0]
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
Local
Interconnect
oe
io_coe
io_caclr
Local
Interconnect
io_csclr
io_cce_out
io_cce_in
io_cclk
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