问题描述
已经发现Spartan-6 LX25器件存在影响引脚与该系列中其他器件兼容性的问题。该问题影响左侧和右侧BUFIO2。每侧有6个IOB，可以使用BUFIO来获取时钟。
解决/修复方法
此问题影响了12个引脚：H3，H4，K5，K6，L5，L7，J13，K14，L12，L13，K15和K16。如果这些引脚由BUFIO2驱动，则LX25与LX16或LX45引脚不兼容。
| LX16 | LX25 | LX45 |
| PAD67引脚= F15 | PAD59-pin = F15 | PAD47 -pin = F15 |
| PAD68引脚= F16 | PAD60引脚= F16 | PAD48 -pin = F16 |
| PAD69-pin = C17 | PAD65引脚= C17 | PAD77 -pin = C17 |
| PAD70引脚= C18 | PAD66引脚= C18 | PAD78 -pin = C18 |
| PAD71-pin = F14 | PAD67引脚= F14 | PAD79 -pin = F14 |
| PAD72-pin = G14 | PAD68-pin = G14 | PAD80 -pin = G14 |
| PAD73引脚= D17 | PAD69-pin = D17 | PAD81 -pin = D17 |
| PAD74引脚= D18 | PAD70引脚= D18 | PAD82 -pin = D18 |
| PAD75引脚= H12 | PAD71-pin = H12 | PAD83 -pin = H12 |
| PAD76-pin = G13 | PAD72引脚= G13 | PAD84 -pin = G13 |
| PAD77-pin = E16 | PAD73-pin = E16 | PAD85 -pin = E16 |
| PAD78-pin = E18 | PAD74引脚= E18 | PAD86 -pin = E18 |
| PAD79-pin = K12 | PAD75引脚= K12 | PAD87 -pin = K12 |
| PAD80引脚= K13 | PAD76-pin = K13 | PAD88 -pin = K13 |
| PAD81-pin = F17 | PAD77-pin = F17 | PAD89 -pin = F17 |
| PAD82引脚= F18 | PAD78引脚= F18 | PAD90 -pin = F18 |
| PAD83-pin = H13 | PAD79-pin = H13 | PAD91 -pin = H13 |
| PAD84-pin = H14 | PAD80引脚= H14 | PAD92？引脚= H14 |
| PAD85引脚= H15 | PAD81-pin = H15 | PAD93 -pin = H15 |
| PAD86-pin = H16 | PAD82引脚= H16 | PAD94 -pin = H16 |
| PAD87-pin = G16 | PAD83-pin = G16 | PAD95 -pin = G16 |
| PAD88-pin = G18 | PAD84-pin = G18 | PAD96 -pin = G18 |
| PAD89-pin = J13 | PAD97 -pin = J13 | |
| PAD90-pin = K14 | PAD98 -pin = K14 | |
| PAD91-pin = L12 | PAD99 -pin = L12 | |
| PAD92-pin = L13 | PAD100-pin = L13 | |
| PAD93-pin = K15 | PAD101-pin = K15 | |
| PAD94引脚= K16 | PAD102-pin = K16 |
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