mitsubishi - Al Kossow's Bitsavers

MITSUBISHI MICROCOMPUTERSMSM80C49· XXXP/MSM80C39P·6SINGLE-CHIP 8-BIT CMOS MICROCOMPUTERSWITCHING CHARACTERISTICS (T a= -40-85"C, Vee= 5V ± 10%, VSS=OV, unless otherwise noted)AlternativeLimitsSymbol Parameter Unitsymbol Min Typ MaxtW(ALE) ALE pulse width tLL 400 nstd (A-ALE) Delay time, address to A LE signal tAL 150 nstv (ALE-A) Address valid time after ALE tLA 80 nstw(PSEN) P SEN pulse width tee 700 nstw(R) RD pulse width tee 700 nstw(W) W R pulse width . tee 700 nstd (O-W) Delay time, data to W R signal tow 500 nstv (W-O) Data valid time after WR two 120 nstd (A-W) Delay time, address to WR signal tAW 230 nstd (AZ-R) Delay time address floating to R 0 signal tAFe 0 nstd(AZ-PSEN) Delay time, address floating to PSEN signal tAFe 0 nstd(PC-PROG) Delay time, port control to PROG signal tep 110 nstv(PROG-PC) Port control valid time after PROG tpe 140 nstd(O-PROG) Delay time, data to PROG signal top 220 nstv(PROG-O) Data valid time after PROG tpo 65 nstW(PROGL) PROG low pulse width tpp 1510 nstd (O-ALE) Data time data to ALE tpL 400 nstv (ALE-O) Data valid time after ALE tLP 100 nsNote: Conditions of measurement: control output CL : 80pFdata bus output, port output CL : 150pF tc : 2.5lls0. 7V ee ----.... ~----Xo.7vee0. 3Vee ____..J..0. 3V eeIITIMING DIAGRAMRead from External Data MemoryALEtW(R)Write to External Data MemoryALEWR ----------------,1td (AZ-R)th (R-O)BUSInstruction Fetch from External ProgramMemorytcPort 2ALEtw (PSEN)BUS-..u_--