PAL16C1                                          PAL DESIGN SPECIFICATION
P7032                                               BIRKNER/COLI 07/12/81
BETWEEN LIMITS COMPARATOR/LOGIC
MMI SUNNYVALE, CALIFORNIA
/EQ1U /LT1L /EQ1L /GT2U /EQ2U /LT2L /EQ2L /GT3U /EQ3U GND
/LT3L /EQ3L   NC    NC   BTWL  OUTL /GT0U /LT0L /GT1U VCC


/BTWL =  GT3U                       ;GT CR-3U
      +  EQ3U * GT2U                ;EQ CR-3U, GT CR-2U
      +  EQ3U * EQ2U * GT1U         ;EQ CR-3U, EQ CR-2U, GT CR-1U
      +  EQ3U * EQ2U * EQ1U * GT0U  ;EQ CR-3U, EQ CR-2U, EQ CR-1U, GT CR-0U
      +  LT3L                       ;LT CR-3L
      +  EQ3L * LT2L                ;EQ CR-3L, LT CR-2L
      +  EQ3L * EQ2L * LT1L         ;EQ CR-3L, EQ CR-2L, LT CR-1L
      +  EQ3L * EQ2L * EQ1L * LT0L  ;EQ CR-3L, EQ CR-2L, EQ CR-1L, LT CR-0L


FUNCTION TABLE

GT3U EQ3U EQ3L LT3L GT2U EQ2U EQ2L LT2L GT1U EQ1U EQ1L LT1L GT0U LT0L OUTL BTWL

; COMPARATOR REGISTERS
;CR-3  CR-2  CR-1  CR-0
;GEEL  GEEL  GEEL  G  L
;TQQT  TQQT  TQQT  T  T     OUTPUTS
;UULL  UULL  UULL  U  L    OUTL  BTWL     COMMENTS
-----------------------------------------------------------------
 HLLL  XXXX  XXXX  X  X     H     L       OUT OF LIMITS (GT3U=H)
 LHLL  HLLL  XXXX  X  X     H     L       OUT OF LIMITS (GT2U=H)
 LHLL  LHLL  HLLL  X  X     H     L       OUT OF LIMITS (GT1U=H)
 LHLL  LHLL  LHLL  H  L     H     L       OUT OF LIMITS (GT0U=H)
 LHLL  LHLL  LHLL  L  H     L     H       BETWEEN LIMITS
 LHLL  LHLL  LLHL  X  X     L     H       BETWEEN LIMITS
 LHLL  LHLL  LLLH  X  X     L     H       BETWEEN LIMITS
 LHLL  LLHL  XXXX  X  X     L     H       BETWEEN LIMITS
 LHLL  LLLH  XXXX  X  X     L     H       BETWEEN LIMITS
 LLHL  HLLL  XXXX  X  X     L     H       BETWEEN LIMITS
 LLHL  LHLL  XXXX  X  X     L     H       BETWEEN LIMITS
 LLHL  LLHL  HLLL  X  X     L     H       BETWEEN LIMITS
 LLHL  LLHL  LHLL  X  X     L     H       BETWEEN LIMITS
 LLHL  LLHL  LLHL  H  L     L     H       BETWEEN LIMITS
 LLHL  LLHL  LLHL  L  H     H     L       OUT OF LIMITS (LT0L=H)
 LLHL  LLHL  LLLH  X  X     H     L       OUT OF LIMITS (LT1L=H)
 LLHL  LLLH  XXXX  X  X     H     L       OUT OF LIMITS (LT2L=H)
 LLLH  XXXX  XXXX  X  X     H     L       OUT OF LIMITS (LT3L=H)
-----------------------------------------------------------------


DESCRIPTION

THE BETWEEN LIMITS LOGIC CHECKS THE LT, EQ, AND GT STATUS FROM THE
COMPARATOR REGISTERS TO DETERMINE IF THE DATA IS BETWEEN THE UPPER
AND LOWER LIMITS LOADED IN THE COMPARATOR REGISTERS.  BOTH BETWEEN
LIMITS (BTWL) AND OUT OF LIMITS (OUTL) OUTPUTS ARE PROVIDED.