Document
NEe Microcomputers, Inc.
4-81T SINGLE CHIP MICROCOMPUTER
NEe
Jl-PD554
DESCRIPTION
The J,lP0554 is the standard J,lCOM-45 4·bit single chip microcomputer. with high voltage outputs that can be'pulled to -35V for direct interfacing to vacuum fluorescent displays. The J,lP0554 is manufactured with a standard PMOS process. allowing use of a single -1 OV power supply. The J,lP0554 provides all of the hardware features of the J,lCOM-45 family. and executes all 58 instructions of the J,lCOM-45 instruction set.
PIN CONFIGURATION
Cll PCo PC,
PC2 PCa POo PO, P02 POa PEO PEl PE2 PE3 VSS
Clo VGG RESET
iNT
PAa PA2
PAl PAo PGO PF3 PF2 PF, PFo TEST
PAo-PAa PCo,PC3 POO-P03 PEo·PEa PFo·PFa PGO INT ClO·Cll RESET
VGG VSS TEST
PIN NAMES Input Port A Input/Output Port C Input/Output Port 0 Output Port E Output Port F Output Port G Interrupt Input External Clock Signals
Reset Power Suppl y Negative Power Supply Positi ve Factory Test Pi n (Connect to V55)
II
ABSOLUTE MAXIMUM RAT INGS*
Operati.