NEC D8035 8-bit Single Chip Processor PDIP-40

Description

NEC D8035 8-bit Single Chip Processor PDIP-40 The NEC D8035 8-bit Single Chip Processor PDIP-40 is an HMOS, parallel 8-bit microprocessor offered in a 40-pin PDIP package, designed for embedded control and microcomputer peripheral expansion. It implements the familiar 8-bit instruction set family, provides on-chip data RAM and I/O, an internal oscillator/clock generator and a programmable timer/event counter, and is intended to operate from a single +5VDC supply while using external program memory for code storage. Features 8-bit HMOS CPU core with compact instruction set and efficient single-cycle instruction execution for many opcodes. Maximum operating frequency up to 6MHz for standard PDIP variants. 64×8 bits of internal data RAM for runtime data and stack usage. 27 programmable I/O lines arranged as two 8-bit ports and one 11/6-bit port for flexible interfacing. On-chip interval timer / event counter and test inputs for timing, counting and debug functions. Multiplexed address/data bus with ALE, RD, WR and PSEN control signals for interfacing to external program memory and peripherals. Internal clock generator with external crystal/resonator support for simple clocking. Single +5VDC supply operation with industry-standard TTL/MOS logic levels. PINOUT No. Symbol Function 1 T0 Test 0 input / output. 2 XTAL1 Crystal 1 input. 3 XTAL2 Crystal 2 input. 4 RESET Reset input. 5 SS Single step input. 6 INT Interrupt input. 7 EA External access input. 8 RD Read output (or read strobe). 9 PSEN Program store enable output. 10 WR Write output (or write strobe). 11 ALE Address latch enable output. 12–19 DB0–DB7 Bidirectional data bus (AD0–AD7 / DB0–DB7). 20 VSS Ground. 21–24, 35–38 P2₀–P2₇ Quasi-bidirectional Port 2. 25 PROG Program output. 26 VDD RAM power supply. 27–34 P1₀–P1₇ Quasi-bidirectional Port 1. 39 T1 Test 1 input. 40 VCC Primary power supply (+5 V). Specifications Parameter Value Core 8-bit HMOS CPU. Max Frequency 6MHz. Internal RAM 64×8bits. Program Memory External (no internal ROM). I/O Ports 27 lines (2×8bit ports + additional control/PC lines). Timer Counter On-chip 8-bit interval timer / event counter. Address Data Bus Multiplexed AD0–AD7 with ALE, RD, WR, PSEN control. Supply Voltage +5VDC. Operating Temp 0°C to +70°C Package 40-pin PDIP. Power Dissipation Typical operating currents and DC characteristics per datasheet. Note: for full specifications, check the datasheet at the end of the page. Applications External program-memory systems and legacy 8-bit microcomputer designs. Embedded controllers for appliances, instrumentation and industrial control. I/O expansion and simple data-acquisition front ends. Educational, hobbyist and repair use where DIP packaging and 8080/8085-style bus compatibility are required. Package Contents 1x NEC D8035 8-bit Single Chip Processor PDIP-40. Documents Datasheet D8035

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