FPGA中IP_0/VERF_0 像这种管脚 怎么设置成普通IO
时间：10-02
整理：3721RD
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想把IP_0/VERF_0当成普通IO用，编写ucf文件时出现了这样的错误
ERRORack:1107 - Pack was unable to combine the symbols listed below into a
single IOB component because the site type selected is not compatible.
Further explanation:
The component type is determined by the types of logic and the properties and
configuration of the logic it contains. In this case an IO component of type
IOB was chosen because the IO contains symbols and/or properties consistent
with output or bi-directional usage and contains no other symbols or
properties that require a more specific IO component type. Please double
check that the types of logic elements and all of their relevant properties
and configuration options are compatible with the physical site type of the
constraint.
Summary:
Symbols involved:
BUF symbol "bd_2_IOBUF/IBUF" (Output Signal = N19)
TBUF symbol "bd_2_IOBUF/OBUFT" (Control Signal = bd_and0000_inv)
PAD symbol "bd<2>" (Pad Signal = bd<2>)
Component type involved: IOB
Site Location involved: P35
Site Type involved: DIFFSI_NDT
ERRORack:1107 - Pack was unable to combine the symbols listed below into a
single IOB component because the site type selected is not compatible.
Further explanation:
The component type is determined by the types of logic and the properties and
configuration of the logic it contains. In this case an IO component of type
IOB was chosen because the IO contains symbols and/or properties consistent
with output or bi-directional usage and contains no other symbols or
properties that require a more specific IO component type. Please double
check that the types of logic elements and all of their relevant properties
and configuration options are compatible with the physical site type of the
constraint.
Summary:
Symbols involved:
BUF symbol "dox_0_OBUF" (Output Signal = dox<0>)
PAD symbol "dox<0>" (Pad Signal = dox<0>)
Component type involved: IOB
Site Location involved: P123
Site Type involved: IBUF
ERRORack:1107 - Pack was unable to combine the symbols listed below into a
single IOB component because the site type selected is not compatible.
Further explanation:
The component type is determined by the types of logic and the properties and
configuration of the logic it contains. In this case an IO component of type
IOB was chosen because the IO contains symbols and/or properties consistent
with output or bi-directional usage and contains no other symbols or
properties that require a more specific IO component type. Please double
check that the types of logic elements and all of their relevant properties
and configuration options are compatible with the physical site type of the
constraint.
Summary:
Symbols involved:
BUF symbol "bd_2_IOBUF/IBUF" (Output Signal = N19)
TBUF symbol "bd_2_IOBUF/OBUFT" (Control Signal = bd_and0000_inv)
PAD symbol "bd<2>" (Pad Signal = bd<2>)
Component type involved: IOB
Site Location involved: P35
Site Type involved: DIFFSI_NDT
ERRORack:1107 - Pack was unable to combine the symbols listed below into a
single IOB component because the site type selected is not compatible.
Further explanation:
The component type is determined by the types of logic and the properties and
configuration of the logic it contains. In this case an IO component of type
IOB was chosen because the IO contains symbols and/or properties consistent
with output or bi-directional usage and contains no other symbols or
properties that require a more specific IO component type. Please double
check that the types of logic elements and all of their relevant properties
and configuration options are compatible with the physical site type of the
constraint.
Summary:
Symbols involved:
BUF symbol "dox_0_OBUF" (Output Signal = dox<0>)
PAD symbol "dox<0>" (Pad Signal = dox<0>)
Component type involved: IOB
Site Location involved: P123
Site Type involved: IBUF
之前看了很多帖子，但都没有明确说明怎么用?
像这种IP/VREF
(1) ip型 只能作为input io
(2) IO型 可以作为用户io
想在想用这种普通IO型的模式，在ucf文件里面设置，还是该怎么设置?
之前看过IP/VREF 管脚分两类
（1） ip型，可以做为input io
（2） io型，用户io
如想用第二个 该怎么设置呢? 各位大侠 麻烦指点一下 谢谢
thanks for sharing