UPD552

NEe Microcomputers, Inc. NEe JLPD552 4·81T SINGLE CHIP MICROCOMPUTER D ESC RIPTION The .uPD552 is a .uCOM-44 4-bit single chip microcomputer with high voltage outputs that can be pulled to -35V for direct interfacing to vacuum fluorescent displays_ The .uPD552 is manufactured with a standard PMOS process, allowing use of a single -10V power supply. The .uPD552 provides all of the hardware features of the .uCOM-44 family, and executes all 58 instructions of the .uCOM-44 instruction set. PIN CONFIGURATION Cll PCo PCl PC2 PC3 iN'f RESET PDO PDl PD2 PD3 PEa PEl PE2 PE3 PFo PFl PF2 PF3 TEST Vss PAO-PA3 PBO-PB3 PCO-PC3 PDO-PD3 PEO-PE3 PFO-PF3 PGO-PG3 PHO-PH3 PIO-PI2 Tl\IT ClO-Cll RESET VGG VSS TEST PIN NAMES Input Port A Input Port B Input/Output Port C Input/Output Port D Output Port E Output Port F Output Port G Output Port H Output Port I 1nterrupt Input External Clock Signals Reset Power Supply Negative Power Supply Positive Factory Test Pin (Connect to VSS) II ABSOLUTE MAXIMUM...