mitsubishi - Al Kossow's Bitsavers

~ ________MITSUBISHI MICROCOMPUTERSMSM82C43PINPUT/OUTPUT EXPANDERTIMING DIAGRAMcstsu(CS PRJth(PR CS)tW(PR)~,.PROGi\[ItSU(INST PRJ th(PR INST) tSU(DQ PRJ th(PR DQ)IPort 2CD):ta(PR)~R),Port 2IPort 4-7Port 4-7~ell'ItpZX(PR)-@J""tpHL(PR)\:I~LH(:R) -®'1,KtpXZ( PRJPort 4-7Port 4-7tSU( PORT PRJNote 1 : Input pulse level································ 0.3 X Vee-O.7 X VeeInput pulse rise time tr ............................................... 20nsInput pulse fall time tf .........................................x:: ...... 20nsReference voltage for switching characteristic measurementO. 7XVec ------"" -----O. 7XV ce0.3 XVec _____-J. _ O.3XVee'~'Ir.th(PR PORT):KCurrent Sinking Capability7For this case, each of the 7 lines could sink 8mA for a totalof 56mA. Since a 4mA reserve sinking capability exists, 9 ofthe I/O lines of the M5M82C43P can be divided arbitrarily. .6-36 .MITSUBISHI"ELECTRIC