mitsubishi - Al Kossow's Bitsavers

~MITSUBISHI MICROCOMPUTERSMSL8048-XXXP IMSL803SLPSINGLE-CHIP a-BIT MICROCOMPUTERSWITCHI NG CHARACTERISTICS (Ta= -20-75"C. Vee =Voo=5Vt 10%. VSS=OV. unless otherwise noted)SymbolParameterAlternativesymbolLimitsMin Typ Maxtw (ALE) ALE pulse width t LL 400 nstd (A·AlE) Delay time. address to ALE signal tAL 120 nstv (ALE-A) Address valid time after ALE tLA 80 nstw (PSEN) PSEN pulse width tcc 700 nstw (R) lID pulse width tcc 700 nstw(W) W11 pulse width tcc 700 ns-td(Q-W) Delay time. data to iNA signaltow 500 nsf--'-'---'--tV(W-Q) Data valid time after WI1 two 120 nstd(A-W) Delay time. address to WR signal tAW 230 nstd (AZ-R) Delay time. address disatile to RU signal tAFC 0 nstd (AZ-PSEN) Delay time. address disable to PSE N signal tAFC 0 nstd (PC-PROG) Delay time. port control to PROG signal tcp 110 nstv (PROG-PC) Port control valid time after PROG tpc 100 nstp(Q-PROG) Delay time. data to PROG signal top 250 nstv (PROG-Q) Data valid time after PROG tpo 65 nstw (PROGl) PROG low pulse width tpp 1200 nstd (Q-AlE) Delay time. data to ALE Signal tPL 350 nstv (AlE-Q) Data valid time after ALE t LP 150 ns_.Note 2: Conditions of measurement: control output CL =80pFdata bus output. pOrt output C l = 150p F. tc=2. 5,u s3: Reference levels for the input/output voltages are low level=O.8V and high level =2VUnitTIMING DIAGRAMRead from External Data MemoryWrite to External Data MemoryALEALERD ---------; t-.:..:..'-'-~jl._------WR --------,1th (R-O)tv (W-Q)BUSBUS----~~~--r-~~~-------Instruction Fetch from External Program MemoryPort 2ALEALEPSEN -------~----.BUStsu (A-D)th(PSEN-O)DURINGINPUTPORT CONTROL INPUT DATAtd (PCoPROG)~ I, (PRO:'PC)PROG --------------cs-.~PROGL) ~""----4-24 ' •. MITSUBISHI..... ELECTRIC