n     n                     n                  
                                          r     m V                   r                  
                                    V     o     e C                   a   V              
                +   + +           n C     m     m C n                 m   C              
                n + n n   G       r C t   _ a G _ I c G r G           _   C              
                C C W R a N a t t t I x t c 1 N r N t N x N t a a t d c d I d d d d d d  
                S S S S 3 D 1 2 3 s O d 4 s 0 D d T s D d D 5 0 2 6 0 s 7 O 6 5 4 3 2 1  
              --------------------------------------------------------------------------_ 
             / 144 142 140 138 136 134 132 130 128 126 124 122 120 118 116 114 112 110   |_ 
            /    143 141 139 137 135 133 131 129 127 125 123 121 119 117 115 113 111 109    | 
      #TCK |  1                                                                         108 | ^DATA0 
^CONF_DONE |  2                                                                         107 | ^DCLK 
     ^nCEO |  3                                                                         106 | ^nCE 
      #TDO |  4                                                                         105 | #TDI 
     VCCIO |  5                                                                         104 | GND 
       GND |  6                                                                         103 | VCCINT 
        t1 |  7                                                                         102 | r1 
        l1 |  8                                                                         101 | r2 
        l2 |  9                                                                         100 | r3 
        l3 | 10                                                                          99 | r4 
 *RDYnBUSY | 11                                                                          98 | r5 
        l4 | 12                                                                          97 | r6 
        l5 | 13                                                                          96 | r7 
        l6 | 14                                                                          95 | r8 
       GND | 15                                                                          94 | VCCIO 
    VCCINT | 16                                                                          93 | GND 
        l7 | 17                                                                          92 | r9 
        l8 | 18                                                                          91 | r10 
        l9 | 19                              ep1k50tc144-3                               90 | r11 
       l10 | 20                                                                          89 | r12 
       l11 | 21                                                                          88 | r13 
       l12 | 22                                                                          87 | r14 
       l13 | 23                                                                          86 | r15 
     VCCIO | 24                                                                          85 | VCCINT 
       GND | 25                                                                          84 | GND 
       l14 | 26                                                                          83 | r16 
       l15 | 27                                                                          82 | r17 
       l16 | 28                                                                          81 | r18 
       l17 | 29                                                                          80 | r19 
       l18 | 30                                                                          79 | r20 
       l19 | 31                                                                          78 | b10 
       l20 | 32                                                                          77 | ^MSEL0 
        b1 | 33                                                                          76 | ^MSEL1 
      #TMS | 34                                                                          75 | VCCINT 
  ^nSTATUS | 35                                                                          74 | ^nCONFIG 
        b2 | 36                                                                          73 | b9 
           |      38  40  42  44  46  48  50  52  54  56  58  60  62  64  66  68  70  72  _| 
            \   37  39  41  43  45  47  49  51  53  55  57  59  61  63  65  67  69  71   | 
             \--------------------------------------------------------------------------- 
                b a b G b a w a V n a a a V a G V G C r G G a a V a b b a G r b a a V a  
                3 5 4 N 5 1 d 1 C m 1 1 8 C 1 N C N L e N N 9 1 C 1 6 7 1 N a 8 7 6 C 4  
                      D   5   8 C e 7 4   C 1 D C D K s D D   3 C 6     2 D m       C    
                                I m       I     I     e         I           _       I    
                                O _       N     N     t         O           a       O    
                                  w       T     T                           1            
                                  r                                         7            
                                                                                         
                                                                                         
                                                                                         


N.C. = No Connect. This pin has no internal connection to the device.
VCCINT = Dedicated power pin, which MUST be connected to VCC (2.5 volts).
VCCIO = Dedicated power pin, which MUST be connected to VCC (3.3 volts).
GND = Dedicated ground pin or unused dedicated input, which MUST be connected to GND.
RESERVED = Unused I/O pin, which MUST be left unconnected.

^ = Dedicated configuration pin.
+ = Reserved configuration pin, which is tri-stated during user mode.
* = Reserved configuration pin, which drives out in user mode.
PDn = Power Down pin. 
@ = Special-purpose pin. 
# = JTAG Boundary-Scan Testing/In-System Programming or Configuration Pin. The JTAG inputs TMS and TDI should be tied to VCC and TCK should be tied to GND when not in use.
& = JTAG pin used for I/O. When used as user I/O, JTAG pins must be kept stable before and during configuration.  JTAG pin stability prevents accidental loading of JTAG instructions.
$ = Pin has PCI I/O option enabled. Pin is not '5.0 V'-tolerant.