NXP Semiconductors P89LPC932A1FDH,529

Overview

P89LPC932A1FDH,529 from NXP Semiconductors is an 8-bit accelerated two-clock 80C51 microcontroller in TSSOP28 package, featuring 8 kB byte-erasable flash, 512-byte data EEPROM, dual analog comparators, and integrated CCU for PWM/capture/compare functions. It operates from 2.4 V to 3.6 V with 5 V-tolerant I/Os and supports industrial control, sensor interface, and low-power embedded systems requiring on-chip oscillator and brownout reset.

For engineers reviewing the P89LPC932A1FDH,529 datasheet, P89LPC932A1FDH,529 pinout, P89LPC932A1FDH,529 application, or P89LPC932A1FDH,529 equivalent, key selection criteria include its 23+ configurable I/O pins, 18 MHz max CPU clock (111 ns instruction cycle), RTC-capable 23-bit system timer, ISP/IAP capability, and TSSOP28 footprint compatibility with PLCC/HVQFN alternatives.

Technical Context

The P89LPC932A1FDH,529 implements a high-efficiency 2-clock 80C51 core delivering six times the throughput of standard 80C51 at identical frequencies, with instruction cycles ranging from 111 ns to 222 ns at 18 MHz. Its architecture integrates dual 16-bit counter/timers, a 23-bit system timer usable as RTC, and a Capture/Compare Unit (CCU) supporting four independent output compare channels (OCA–OCD) and two input capture inputs (ICA/ICB).

It features a programmable on-chip oscillator (20 kHz–18 MHz), selectable internal RC clock source with fine tuning, and robust system supervision including watchdog timer with independent oscillator, low-voltage reset (brownout detect), and four interrupt priority levels. All I/O ports support Schmitt-trigger inputs and configurable drive modes (quasi-bidirectional, open-drain, push-pull, input-only).

Key Specifications

Pinout & Package

TSSOP28 package (SOT361-1), 4.4 mm body width, 28-pin surface-mount with 0.65 mm pitch. Pinout validated per NXP datasheet Rev. 03 (March 2007), Fig. 3 and Table 2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with P89LPC932A1FDH,529, the P89LPC935FBD,518 offers higher I/O density and flash capacity in a different package, while the P89LPC925FDH,529 provides a cost-optimized variant with reduced memory and no CCU - both require functional validation before substitution.

Availability

P89LPC932A1FDH,529 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and low-power embedded control applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for P89LPC932A1FDH,529 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The P89LPC932A1FDH,529 belongs to NXP's LPC900 family of enhanced 80C51 microcontrollers, designed specifically for cost-sensitive, space-constrained embedded systems requiring high integration, low power, and in-field programmability.

FAQ

What is the maximum operating frequency of the P89LPC932A1FDH,529?

The P89LPC932A1FDH,529 supports a maximum CPU clock frequency of 18 MHz when using an external crystal or resonator. At this frequency, its accelerated two-clock 80C51 core achieves instruction cycle times as fast as 111 ns - six times faster than a standard 80C51 running at the same clock rate. The internal RC oscillator is factory-trimmed and tunable for frequencies up to 18 MHz, though typical accuracy is ±2% over temperature and voltage.

Does the P89LPC932A1FDH,529 support in-system programming (ISP)?

Yes, the P89LPC932A1FDH,529 supports Serial Flash In-System Programming (ISP) via its UART interface, allowing firmware updates while the device is soldered into the target application. This capability requires no external programming hardware beyond a simple level-shifter and is enabled by holding P1.5 (RST) low during power-up to enter ISP mode. Flash Magic v1.98+ is the recommended tool for reliable ISP operations.

How many I/O pins does the P89LPC932A1FDH,529 provide in the TSSOP28 package?

The P89LPC932A1FDH,529 in TSSOP28 provides 23 dedicated I/O pins minimum, scalable to 26 I/Os when using on-chip oscillator and reset options. Port 0 (8 pins), Port 1 (8 pins), Port 2 (8 pins), and Port 3 (2 pins) collectively offer 26 configurable I/Os, though P1.5 is input-only (RST), and P3.0/P3.1 default to oscillator functions unless reconfigured - resulting in ≥23 user-accessible GPIOs in standard configurations.

What is the function of the CCU in the P89LPC932A1FDH,529?

The Capture/Compare Unit (CCU) in the P89LPC932A1FDH,529 provides four output compare channels (OCA–OCD) and two input capture inputs (ICA/ICB). It enables precise PWM generation, pulse-width measurement, frequency capture, and synchronized waveform generation - all controlled via dedicated SFRs (TCR20, OCRAH/OCRAL, etc.) without CPU intervention. This offloads timing-critical tasks from the main core.

Is the P89LPC932A1FDH,529 compatible with 5 V logic interfaces?

Yes, all I/O pins of the P89LPC932A1FDH,529 are 5 V tolerant - they may be pulled up to or driven by 5.5 V signals while operating from a 2.4–3.6 V VDD supply. This eliminates level-shifting components when interfacing with legacy 5 V peripherals such as displays, sensors, or communication transceivers, simplifying design and reducing BOM cost.