EE NMOS 4-Bit Single-Chip Microcomputers ie LM6413/6416/6417 Overview The LM6413/6416/6417 NMOS 4-bit single-chip micro- computers are optimized for consumer equipment. They are compact and powertul, yet have an excellent cost/per- formance ratio. These microcomputers contain a high-speed 4-bit paral- lel-processing CPU core, 1K to 2K bytes of ROM, 64 to 128 words (by 4 bits) of RAM, a programmable timer, clock gen- erator, and 17 to 21 I/O pins that can withstand up to 15 V and can interface directly with 12 V equipment. The LM6413/6416/6417 microcomputers have 65 instructions. Their capabilities include subroutine nesting, a wide range of timer settings, automatic stepping of page settings, and pseudo-interrupt functions. The LM6413/6416/6417 microcomputers are ideal for logic replacement in consumer equipment and for sub- CPUs in multi-CPU systems. Features @ Single 5 V power supply with wide voltage operating range (4.5 to 6.5 V) @ N-channel E/D MOS @ CMOS/TTL compatible @ 1K to 2K bytes of ROM, 64 to 128 words (by 4 bits) of RAM @ Wide range of settings for programmable timer @ 17 to 21 I/O pins that can interface directly with 12 V equipment. All ports can withstand 15 V. Normal current output ports provide 20 mA. @ On-chip clock generator (ceramic resonator external) LM6413E/16E/17F : RC oscillator LM6413F/16F : Ceramic resonator @ Interrupts pseudo-interrupts, 1 internal, 1 external @ Schmitt trigger gates on-chip for reset and external inter- rupt pins Mm LM6413/6416/6417 @ Subroutine nesting 2 levels @ Automatic stepping of page settings @ 1 Kbyte and 2 Kbyte versions/instruction and pin-com- patible @ High-speed operation LM6413E/16E minimum cycle time : 4.0psat4.5V LM6413F/16F/17F minimum cycle time : 2.94 us at 4.5 V @ Instruction set 65 instructions Applications @ Consumer equipment (logic replacement, sub-CPU of multi-CPU system) @ Other small to mid-scale equipment where low cost is needed (control) Ports ROM RAM Cycle Evaluation Type No. (bits) (bits) time | Withstand No. of SVO | Timers | Package chip Notes volta Current A ge pins LM6413E 4.0 ps RC osciliator 2aKx8 128 x 4 15V 20 mA 21 1 DIP-28S LM64PG98_ |} LM6413F 2.94 Us Ceramic resonator LM6416E 4.0 us RC oscillator 1Kx8 64 x4 15V 20 mA 21 1 DIP-28S LM64PG97 LM6416F 2.94 Us Ceramic resonator LM6417F 1Kx8 64x4 | 2.94 us 15V 20 mA 17 1 DIP-22 LM64PG97 RC oscillatorEe LM6413/6416 Block Diagram RAM DP Counter ROM | 1/O Buffer 7 PORT 4 PGO inn oO Pros <i PORT Kms PE 0-3 oo PORT Ke ub ub E PORT PORT D C PD9-3 PC 9-3 aq ; H a | STACK 1 STACK 2 Timer Counter i PORT Pseudo- interrupts PAg-3 =o INT =O RES +O Xtal Extal +o vDD +0 VSS