PLE8P8                                        PLE DESIGN SPECIFICATION
P5013                                            VINCENT COLI 12/08/82
4-BIT MULTIPLIER
MMI SANTA CLARA, CALIFORNIA
.ADD X0 X1 X2 X3 Y0 Y1 Y2 Y3
.DAT S0 S1 S2 S3 S4 S5 S6 S7


S7,S6,S5,S4,S3,S2,S1,S0 = X3,X2,X1,X0 .*. Y3,Y2,Y1,Y0      ; S = X * Y


FUNCTION TABLE

X3 X2 X1 X0 Y3 Y2 Y1 Y0 S7 S6 S5 S4 S3 S2 S1 S0

;-OPERANDS-    PRODUCTS
;XXXX  YYYY    SSSSSSSS     COMMENTS
;3210  3210    76543210
------------------------------------------
 LLLL  LLLL    LLLLLLLL     0 *  0  =   0
 LLLH  HHHH    LLLLHHHH     1 * 15  =  15
 HHHH  LLLH    LLLLHHHH    15 *  1  =  15
 HHHH  HHHH    HHHLLLLH    15 * 15  = 225
------------------------------------------


DESCRIPTION

THIS PLE8P8 PERFORMS 4-BIT LOOK-UP TABLE MULTIPLICATION.  THE DEVICE
ACCEPTS TWO 4-BIT OPERANDS (X3-X0 AND Y3-Y0) TO PRODUCE THE 8-BIT
PRODUCT (S7-S0).  THE PLE8P8 ALSO HAS THREE-STATE OUTPUTS WITH TWO
ACTIVE-LOW OUTPUT ENABLE CONTROL PINS (/E1 AND /E2).


                           X3 X2 X1 X0
                     X     Y3 Y2 Y1 Y0
               ------------------------
               S7 S6 S5 S4 S3 S2 S1 S0