UPD553

NEe Microcomputers, Inc. NEe ,",PD553 4-81T SINGLE CHIP MICROCOMPUTER DESCRIPTION The fJP0553 is a fJCOM-43 4-bit single chip microcomputer with high voltage outputs that can be pulled to -35V for direct interfacing to vacuum fluorescent displays. The fJP0553 is manufactured with a standard PMOS process, allowing use of a single -1 OV power supply. The fJP0553 provides all of the hardware features of the fJCOM-43 family, and executes all 80 instructions of the fJCOM-43 instruction set. PIN CONFIGURATION Cll PCO PCl PC2 PC3 TNT RESET PDO PDl PD2 PD3 PEO PEl PE2 PE3 PFo PFI PF2 PF3 TEST VSS 1 2 3 4 5 6 7 B 9 10 11 12 13 14 15 16 17 18 19 20 21 fJPD 553 ClO VGG PB3 PB2 PBl PBo PA3 PA2 PAl PAO PI2 Pll PIO PH3 PH2 PHI PHO PG3 PG2 PGl PGo PAO-PA3 PBO-PB3 PCO-PC3 PDO-PD3 PEo-PEa PFo-PFa PGo-PGa PHo-PHa PIO-PI2 CLO-CLI INT RESET VGG VSS TEST PIN NAMES Input Port A Input Port B Input/Output Port C Input/Output Port 0 Output Port E Output Port F Output Port G Output Port H Output Port...