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``` 核心板引脚分配:
define_attribute {p:rst_n} {PAP_IO_DIRECTION} {INPUT} define_attribute {p:rst_n} {PAP_IO_LOC} {U12} define_attribute {p:rst_n} {PAP_IO_VCCIO} {3.3} define_attribute {p:rst_n} {PAP_IO_STANDARD} {LVTTL33}
define_attribute {p:sys_clk} {PAP_IO_DIRECTION} {INPUT} define_attribute {p:sys_clk} {PAP_IO_LOC} {B5} define_attribute {p:sys_clk} {PAP_IO_VCCIO} {3.3} define_attribute {p:sys_clk} {PAP_IO_STANDARD} {LVTTL33}
```
``` SPI2_CS 48 R2_13_N V14 SPI2_MOSI 50 R2_13_P U14 SPI2_SCK 54 R2_2_N V13 SPI2_MISO 56 R2_2_P U13
```
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