PAL20L10                                      PAL DESIGN SPECIFICATION
P7069                                            VINCENT COLI 10/21/81
10-BIT BUFFER
MMI SUNNYVALE, CALIFORNIA
POL D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 GND
/OC Y9 Y8 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 VCC


IF(OC)  /Y0 = /D0* POL                 ;OUTPUT  D0 (TRUE)
            +  D0*/POL                 ;OUTPUT /D0 (COMP)

IF(OC)  /Y1 = /D1* POL                 ;OUTPUT  D1 (TRUE)
            +  D1*/POL                 ;OUTPUT /D1 (COMP)

IF(OC)  /Y2 = /D2* POL                 ;OUTPUT  D2 (TRUE)
            +  D2*/POL                 ;OUTOUT /D2 (COMP)

IF(OC)  /Y3 = /D3* POL                 ;OUTPUT  D3 (TRUE)
            +  D3*/POL                 ;OUTPUT /D3 (COMP)

IF(OC)  /Y4 = /D4* POL                 ;OUTPUT  D4 (TRUE)
            +  D4*/POL                 ;OUTPUT /D4 (COMP)

IF(OC)  /Y5 = /D5* POL                 ;OUTPUT  D5 (TRUE)
            +  D5*/POL                 ;OUTPUT /D5 (COMP)

IF(OC)  /Y6 = /D6* POL                 ;OUTPUT  D6 (TRUE)
            +  D6*/POL                 ;OUTPUT /D6 (COMP)

IF(OC)  /Y7 = /D7* POL                 ;OUTPUT  D7 (TRUE)
            +  D7*/POL                 ;OUTPUT /D7 (COMP)

IF(OC)  /Y8 = /D8* POL                 ;OUTPUT  D8 (TRUE)
            +  D8*/POL                 ;OUTPUT /D8 (COMP)

IF(OC)  /Y9 = /D9* POL                 ;OUTPUT  D9 (TRUE)
            +  D9*/POL                 ;OUTPUT /D9 (COMP)


FUNCTION TABLE

/OC POL D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Y9 Y8 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0

;/  P   INPUT DATA    OUTPUT DATA
;O  O   DDDDDDDDDD    YYYYYYYYYY
;C  L   9876543210    9876543210      COMMENTS
----------------------------------------------------------------------
 L  H   LLLLLLLLLL    LLLLLLLLLL      TEST L's (TRUE D)
 L  L   LLLLLLLLLL    HHHHHHHHHH      TEST L's (COMP D)
 L  H   HHHHHHHHHH    HHHHHHHHHH      TEST H's (TRUE D)
 L  L   HHHHHHHHHH    LLLLLLLLLL      TEST H's (COMP D)
 L  H   HLHLHLHLHL    HLHLHLHLHL      TEST EVEN CHECKERBOARD (TRUE D)
 L  L   HLHLHLHLHL    LHLHLHLHLH      TEST EVEN CHECKERBOARD (COMP D)
 L  H   LHLHLHLHLH    LHLHLHLHLH      TEST ODD  CHECKERBOARD (TRUE D)
 L  L   LHLHLHLHLH    HLHLHLHLHL      TEST ODD  CHECKERBOARD (COMP D)
 H  X   XXXXXXXXXX    ZZZZZZZZZZ      TEST HI-Z
----------------------------------------------------------------------


DESCRIPTION

THE 10-BIT BUFFER CAN OUTPUT TRUE DATA, COMPLEMENTARY DATA, OR BE HIGH
INPEDANCE.  THE TRUE DATA WILL BE AVAILABLE AT THE OUTPUTS (Y=D) WHEN THE
POLARITY LINE IS HIGH (POL=H).  THE INPUT DATA WILL BE INVERTED (Y=/D)
WHEN THE POLARITY LINE IS LOW (POL=L).

THE TEN OUTPUTS WILL BE HI-Z (Y=Z) IF THE OUTPUT CONTROL LINE IS HIGH
(/OC=H) REGARDLESS OF OTHER INPUTS.

THESE OPERATIONS ARE EXERCISED IN THE FUNCTION TABLE AND SUMMARIZED IN THE
OPERATIONS TABLE:

     /OC  POL  D9-D0  Y9-Y0    OPERATION
     ---------------------------------------
      H    X     X      Z       HI-Z
      L    H     D      D       OUTPUT TRUE
      L    L     D     /D       OUTPUT COMP
     ---------------------------------------