tx2bit.pad

以LVDS设计为例学习ISE中的时序分析以及低层布局器的使用方法 在底层布局器中对LVDS管脚进行约束的方法

 P167   |                          | D1_L18N_Y       |           | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P168   |                          | VREF            |           | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P169   |                          | VREF            |           | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P170   |                          |                 | UNUSED    | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P171   |                          | VREF            |           | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P172   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P173   |                          |                 | UNUSED    | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P174   |                          |                 | UNUSED    | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P175   |                          | VREF            |           | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P176   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P177   |                          | DIN_D0_L15N_YY  |           | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P178   |                          | DOUT_BUSY_L15P_YY           |             |          |          |      |          |           |         |           |
        |                          |                 |           | LVTTL*      | 2        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P179   |                          | CCLK            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P180   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P181   |                          | TDO             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P182   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P183   |                          | TDI             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P184   |                          | CS_L14P_YY      |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P185   |                          | WRITE_L14N_YY   |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P186   |                          | L13P            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P187   |                          | VREF            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P188   |                          | L12P_YY         |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P189   |                          | L12N_YY         |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P190   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P191   |                          | VREF            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P192   |                          | L11N_YY         |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P193   |                          | VREF            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P194   |                          | VREF            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P195   |                          | L10N_YY         |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P196   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P197   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P198   |                          | VCCINT          |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       | 1.8     |           |
 P199   |                          | L9P_YY          |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P200   |                          | L9N_YY          |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P201   |                          | VREF            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P202   |                          | L8P_Y           |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P203   |                          | L8N_Y           |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P204   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P205   |                          | VREF            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P206   |                          | L7N_Y           |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P207   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P208   |                          | VREF            |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P209   |                          | LVDS_DLL_L6P    |           | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P210   |                          |                 | UNUSED    | LVTTL*      | 1        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P211   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P212   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P213   | clk                      |                 | INPUT     | LVTTL       | 0        | 12*      | SLOW*| NONE**   | ***       |         | LOCATED   |
 P214   |                          | VCCINT          |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       | 1.8     |           |
 P215   |                          | LVDS_DLL_L6N    |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P216   |                          | VREF            |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P217   |                          | L5P_Y           |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P218   |                          | VREF            |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P219   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P220   |                          | L4P_Y           |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P221   |                          | L4N_Y           |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P222   |                          | VREF            |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P223   |                          | L3P_YY          |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P224   |                          | L3N_YY          |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P225   |                          | VCCINT          |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       | 1.8     |           |
 P226   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P227   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P228   |                          | L2P_YY          |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P229   |                          | VREF            |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P230   |                          | VREF            |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P231   |                          | VREF            |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P232   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P233   |                          | GND             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P234   |                          | L1P_YY          |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P235   |                          | L1N_YY          |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P236   |                          | VREF            |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P237   |                          | L0N             |           | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P238   |                          |                 | UNUSED    | LVTTL*      | 0        | 12*      | SLOW*| NONE**   | ***       |         |           |
 P239   |                          | TCK             |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
 P240   |                          | VCCO            |           | LVTTL*      |          | 12*      | SLOW*| NONE**   | ***       |         |           |
--------|--------------------------|-----------------|-----------|-------------|----------|----------|------|----------|-----------|---------|-----------|

* Default value.
** This default Pullup/Pulldown value can be overridden in Bitgen.
*** The default IOB Delay is determined by how the IOB is used.


#
# To preserve the pinout above for future design iterations,
# simply invoke PIN2UCF from the command line or issue this command in the GUI.
# For Foundation ISE/Project Navigator - Run the process "Implement Design" -> "Place-and-Route" -> "Back-annotate Pin Locations"
# For Design Manager - In the Design menu select "Lock Pins...
# The location constraints above will be written into your specified UCF file. (The constraints
# listed below are in PCF format and cannot be directly used in the UCF file).
#
COMP "ck" LOCATE = SITE "P113" ; 
COMP "ck_x" LOCATE = SITE "P114" ; 
COMP "clk" LOCATE = SITE "P213" ; 
COMP "clk4x" LOCATE = SITE "P89" ; 
COMP "da" LOCATE = SITE "P110" ; 
COMP "da_x" LOCATE = SITE "P111" ; 
COMP "db" LOCATE = SITE "P117" ; 
COMP "db_x" LOCATE = SITE "P118" ; 
#