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MITSUBISHI MICROCOMPUTERSMS0790SPINPUT /OUTPUT EXPANDEftDESCRIPTIONThe M50790SP is an input/output expander LSI fabricatedusing aluminum-gate CMOS technology. It is designedespecially for connection with the single-chip 8-bit microcomputerseries, and it comes in a 52-pin shrink plasticmolded OIL package.FEATURES• Wide operating voltage range .......................... · 4-14V• Voltage levelconvertable thanks to n-channel opendrainconfiguration at 1/0 port (port R)• Input/output ports (ports P45-P49) ............... 4 bits X 5• .Output ports {ports P40-P44) ....................... 4 bits X 5• Hig'h current output• Output latch data can be read• Input/output setting possible for each bit individuallywith 20bits 1/0 portsPIN CONFIGURATION (TOP' VIEW)(4-14V) VooIP47o- 5INPUT/OUTPUT P47 1 -PORT P47 P472-P473-RESET INPUTCHIP ENABLEINPUTREAD/WRITE R/W -+ 11CONTROL INPUTCLOCK INPUTINP~T/OUTPUT IPORT RNC INPUT/51 .. P46 0 OUTPUT50 .. P453 I PORT P4649 - P452 INPUT/OUTPUT48 - P451 PORT P4547 - P450APPLICATION1/0 expansion for single-chip 8-bit microcomputer M50740-XXXSPOUTPUTPORT P44Outline 52P4B34 -+ P40 3 133 -+ P402 OUTPUT32 -+ P40 1PORT P4031 -+ P40 030 - P49 ! 3 INPUT/29 - P49 2 OUTPUT28 _ P49 PORT P491( Vss (OV)CHIPR/WBLOCK DIAGRAM ENABLE CONTROLINPUT INPUT .RESET INPUT RES CE R/W t/> CL9~~UTIIPOf!T R(4-14V) (OV)Ro R1 R2 R3 Voo Vss-------0--€r----,I24 23 22 21 - 8 7 6 5 - 4 3 2 51P483 P481 P473 P471 P463 P461\ P48~ P480, \ P47~ P470 , ~PORT P48 PORT P47 PORT P466-16 .• MITSUBISHI.... ELECTRIC