PAL20X8 PAL DESIGN SPECIFICATION 74LS380 BIRKNER/KAZMI/BLASCO 02/16/81 MULTIFUNCTION OCTAL REGISTER MMI SUNNYVALE, CALIFORNIA CLK /LD D0 D1 D2 D3 D4 D5 D6 D7 POL GND /OC /PR Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 /CLR VCC ;pinlist 1 to 24 must start in line 5 ;equations go here /Q0 := CLR ;CLEAR + /CLR*/PR*/LD*/Q0 ;HOLD :+: /CLR*/PR* LD* POL*/D0 ;LOAD D0 (TRUE) + /CLR*/PR* LD*/POL* D0 ;LOAD /D0 (COMP) /Q1 := CLR ;CLEAR + /CLR*/PR*/LD*/Q1 ;HOLD :+: /CLR*/PR* LD* POL*/D1 ;LOAD D1 (TRUE) + /CLR*/PR* LD*/POL* D1 ;LOAD /D1 (COMP) /Q2 := CLR ;CLEAR + /CLR*/PR*/LD*/Q2 ;HOLD :+: /CLR*/PR* LD* POL*/D2 ;LOAD D2 (TRUE) + /CLR*/PR* LD*/POL* D2 ;LOAD /D2 (COMP) /Q3 := CLR ;CLEAR + /CLR*/PR*/LD*/Q3 ;HOLD :+: /CLR*/PR* LD* POL*/D3 ;LOAD D3 (TRUE) + /CLR*/PR* LD*/POL* D3 ;LOAD /D3 (COMP) /Q4 := CLR ;CLEAR + /CLR*/PR*/LD*/Q4 ;HOLD :+: /CLR*/PR* LD* POL*/D4 ;LOAD D4 (TRUE) + /CLR*/PR* LD*/POL* D4 ;LOAD /D4 (COMP) /Q5 := CLR ;CLEAR + /CLR*/PR*/LD*/Q5 ;HOLD :+: /CLR*/PR* LD* POL*/D5 ;LOAD D5 (TRUE) + /CLR*/PR* LD*/POL* D5 ;LOAD /D5 (COMP) /Q6 := CLR ;CLEAR + /CLR*/PR*/LD*/Q6 ;HOLD :+: /CLR*/PR* LD* POL*/D6 ;LOAD D6 (TRUE) + /CLR*/PR* LD*/POL* D6 ;LOAD /D6 (COMP) /Q7 := CLR ;CLEAR + /CLR*/PR*/LD*/Q7 ;HOLD :+: /CLR*/PR* LD* POL*/D7 ;LOAD D7 (TRUE) + /CLR*/PR* LD*/POL* D7 ;LOAD /D7 (COMP) ; function table vectors go here FUNCTION TABLE D7 D6 D5 D4 D3 D2 D1 D0 /CLR /PR /LD POL CLK /OC Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 ;function table pin list ; INPUTS CONTROL OUTPUTS COMMENTS ; D7----D0 /CLR /PR /LD POL CLK /OC Q7----Q0 ------------------------------------------------------------------------- ;CLEAR AND PRESET TESTS HHHHHHHH L L L H C L LLLLLLLL CLEAR LLLLLLLL H L L H C L HHHHHHHH PRESET LLLLLLLL L L L L C L LLLLLLLL CLEAR HHHHHHHH H L L L C L HHHHHHHH PRESET ;LOAD DATA - WALKING ZEROS (TRUE DATA) HHHHHHHL H H L H C L HHHHHHHL LOAD HEX (FE) HHHHHHLH H H L H C L HHHHHHLH LOAD HEX (FD) HHHHHLHH H H L H C L HHHHHLHH LOAD HEX (FB) HHHHLHHH H H L H C L HHHHLHHH LOAD HEX (F7) HHHLHHHH H H L H C L HHHLHHHH LOAD HEX (EF) HHLHHHHH H H L H C L HHLHHHHH LOAD HEX (DF) HLHHHHHH H H L H C L HLHHHHHH LOAD HEX (BF) LHHHHHHH H H L H C L LHHHHHHH LOAD HEX (7F) HHHHHHHH H H L H C L HHHHHHHH LOAD HEX (FF) ;LOAD DATA - WALKING ONES (TRUE DATA) LLLLLLLH H H L H C L LLLLLLLH LOAD HEX (01) LLLLLLHL H H L H C L LLLLLLHL LOAD HEX (02) LLLLLHLL H H L H C L LLLLLHLL LOAD HEX (04) LLLLHLLL H H L H C L LLLLHLLL LOAD HEX (08) LLLHLLLL H H L H C L LLLHLLLL LOAD HEX (10) LLHLLLLL H H L H C L LLHLLLLL LOAD HEX (20) LHLLLLLL H H L H C L LHLLLLLL LOAD HEX (40) HLLLLLLL H H L H C L HLLLLLLL LOAD HEX (80) LLLLLLLL H H L H C L LLLLLLLL LOAD HEX (00) ;LOAD DATA - WALKING ONES (COMP DATA) WITH HOLD TESTS LLLLLLLL H H H L C L LLLLLLLL HOLD LLLLLLLL H H L L C L HHHHHHHH LOAD HEX (00) LLLLLLLL H H H H C L HHHHHHHH HOLD LLLLLLLH H H L L C L HHHHHHHL LOAD HEX (01) LLLLLLLL H H H L C L HHHHHHHL HOLD LLLLLLHL H H L L C L HHHHHHLH LOAD HEX (02) HHHHHHHH H H H H C L HHHHHHLH HOLD LLLLLHLL H H L L C L HHHHHLHH LOAD HEX (03) LLLLLLLL H H H L C L HHHHHLHH HOLD LLLLHLLL H H L L C L HHHHLHHH LOAD HEX (80) HHHHHHHH H H H H C L HHHHLHHH HOLD LLLHLLLL H H L L C L HHHLHHHH LOAD HEX (10) LLLLLLLL H H H L C L HHHLHHHH HOLD LLHLLLLL H H L L C L HHLHHHHH LOAD HEX (20) HHHHHHHH H H H H C L HHLHHHHH HOLD LHLLLLLL H H L L C L HLHHHHHH LOAD HEX (40) LLLLLLLL H H H L C L HLHHHHHH HOLD HLLLLLLL H H L L C L LHHHHHHH LOAD HEX (80) HHHHHHHH H H H H C L LHHHHHHH HOLD LLLLLLLL H H L L C L HHHHHHHH LOAD HEX (00) XXXXXXXX X X X X X H ZZZZZZZZ TEST HI-Z ------------------------------------------------------------------------- DESCRIPTION