PLE10P4                                              PLE DESIGN SPECIFICATON
P5005                                                 ULRIK MUELLER 03/28/83
QUAD 2:1 MULTIPLEXER
MMI SANTA CLARA, CALIFORNIA
.ADD S1 S2 A1 A2 A3 A4 B1 B2 B3 B4
.DAT Z1 Z2 Z3 Z4


Z1 = /S1*/S2* S2      ; IF TRUE Z1 = L
   + /S1* S2* A1      ; IF TRUE Z1 = A1 
   +  S1*/S2* B1      ; IF TRUE Z1 = B1
   +  S1* S2          ; IF TRUE Z1 = H   

Z2 = /S1*/S2* S2      ; IF TRUE Z2 = L
   + /S1* S2* A2      ; IF TRUE Z2 = A2
   +  S1*/S2* B2      ; IF TRUE Z2 = B2
   +  S1* S2          ; IF TRUE Z2 = H

Z3 = /S1*/S2* S2      ; IF TRUE Z3 = L
   + /S1* S2* A3      ; IF TRUE Z3 = A3
   +  S1*/S2* B3      ; IF TRUE Z3 = B3
   +  S1* S2          ; IF TRUE Z3 = H

Z4 = /S1*/S2* S2      ; IF TRUE Z4 = L
   + /S1* S2* A4      ; IF TRUE Z4 = A4
   +  S1*/S2* B4      ; IF TRUE Z4 = B4
   +  S1* S2          ; IF TRUE Z4 = H   


FUNCTION TABLE

S1 S2 A1 A2 A3 A4 B1 B2 B3 B4 Z1 Z2 Z3 Z4
;SELECT    DATA  INPUTS    OUTPUT
;  SS       AAAA  BBBB      ZZZZ
;  12       1234  1234      1234      COMMENTS
--------------------------------------------------------
   LL       XXXX  XXXX      LLLL      S=0  =>  Z=L  (0)
   LH       LLLL  XXXX      LLLL      S=1  =>  Z=A  (0)
   LH       LLLH  XXXX      LLLH      S=1  =>  Z=A  (1)
   LH       LLHL  XXXX      LLHL      S=1  =>  Z=A  (2)
   LH       LHLL  XXXX      LHLL      S=1  =>  Z=A  (4)
   LH       HLLL  XXXX      HLLL      S=1  =>  Z=A  (8)
   LH       HHHH  XXXX      HHHH      S=1  =>  Z=A  (F)
   HL       XXXX  LLLL      LLLL      S=2  =>  Z=B  (0)
   HL       XXXX  LLLH      LLLH      S=2  =>  Z=B  (1)
   HL       XXXX  LLHL      LLHL      S=2  =>  Z=B  (2)
   HL       XXXX  LHLL      LHLL      S=2  =>  Z=B  (4)
   HL       XXXX  HLLL      HLLL      S=2  =>  Z=B  (8)
   HL       XXXX  HHHH      HHHH      S=2  =>  Z=B  (F)
   HH       XXXX  XXXX      HHHH      S=3  =>  Z=H  (F)
--------------------------------------------------------

DESCRIPTION

THIS IS AN EXAMPLE OF A QUAD 2-TO-1 MULTIPLEXER IMPLEMENTED IN A PLE10P4.
THE DEVICE FUNCTION IS TO SWITCH BETWEEN TWO 4-BIT INPUTS (A1-A4 AND B1-B4)
TO ONE 4-BIT OUTPUT (Z1-Z4) AS DETERMINED BY TWO INPUT SELECT LINES (S2,S1).
THE PLE10P4 ALSO FEATURES THREE-STATE OUTPUTS WITH TWO ACTIVE LOW ENABLE
PINS (/E1 AND /E2).  THE FUNCTION IS SUMMARIZED BELOW:


SELECT     INPUT  A       INPUT  B            OUTPUT  Z
LINES
 S  S     A  A  A  A     B  B  B  B     !     Z  Z  Z  Z
 1  2     1  2  3  4     1  2  3  4     !     1  2  3  4      FUNCTION
-------------------------------------------------------------------------------
 L  L     X  X  X  X     X  X  X  X     !     L  L  L  L      SELECT ALL LOWS
 L  H     A1 A2 A3 A4    X  X  X  X     !     A1 A2 A3 A4     SELECT A1-A4
 H  L     X  X  X  X     B1 B2 B3 B4    !     B1 B2 B3 B4     SELECT B1-B4
 H  H     X  X  X  X     X  X  X  X     !     H  H  H  H      SELECT ALL HIGHS
-------------------------------------------------------------------------------