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NXP Semiconductors P89C51RC2FBD/01,55
- Part No.:
- P89C51RC2FBD/01,55
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
P89C51RC2FBD/01,55.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,543
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Product details
Overview
P89C51RC2FBD/01 from NXP Semiconductors (formerly Philips) is an 8-bit Flash microcontroller based on the 80C51 architecture, featuring 32 KB ISP/IAP Flash program memory, 512 B RAM, four 8-bit I/O ports, three 16-bit timers, and a programmable counter array (PCA) with PWM and capture/compare capability. It operates at up to 20 MHz in 6-clock mode (40 MHz equivalent performance) and supports industrial temperature range (–40°C to +85°C) in LQFP-44 package for embedded motor control and industrial automation applications.
For engineers reviewing the P89C51RC2FBD/01 datasheet, P89C51RC2FBD/01 pinout, P89C51RC2FBD/01 application, or P89C51RC2FBD/01 equivalent, key selection criteria include its dual-clock mode flexibility (6/12-clock per machine cycle), on-the-fly peripheral clock configuration via CKCON register, integrated enhanced UART with framing error detection, and hardware PCA supporting five independent PWM channels - all critical for real-time I/O and timing-critical firmware deployment.
Technical Context
The P89C51RC2FBD/01 implements a static CMOS 80C51-compatible CPU core with full instruction set compatibility and extends it with In-System Programming (ISP) and In-Application Programming (IAP) support enabled by a dedicated boot ROM loader. Its clock architecture allows independent 6-clock or 12-clock operation for CPU and each peripheral (PCA, UART, Timers 0/1/2) via SFR-controlled CKCON register bits.
It integrates a 5-channel Programmable Counter Array (PCA) with configurable capture/compare/PWM modes, a full-duplex enhanced UART with automatic address recognition and framing error detection, and power management features including Idle and Power-Down modes with oscillator stop capability - all designed for deterministic real-time execution in resource-constrained embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 80C51-compatible 8-bit CPU with 100% instruction set compatibility and static operation down to 0 MHz |
| Flash Memory | 32 KB ISP/IAP Flash with sector erase capability and boot ROM loader for UART-based programming |
| RAM | 512 B on-chip data RAM; externally expandable to 64 KB via MOVX instructions |
| Clock Modes | Configurable 6-clock or 12-clock per machine cycle; CPU and peripherals independently selectable via CKCON register |
| Max Operating Frequency | 20 MHz at 6-clock mode (40 MHz effective throughput); 33 MHz at 12-clock mode |
| I/O & Peripherals | Four 8-bit bidirectional ports; three 16-bit timers; enhanced UART; five-channel PCA with PWM/capture/compare |
| Operating Voltage | 4.5 V to 5.5 V supply range; compatible with standard TTL logic levels |
| Temperature Range | –40°C to +85°C industrial grade operation |
Pinout & Package
LQFP-44 package (SOT389-1), 10 mm × 10 mm body, 0.8 mm pitch, exposed pad optional for thermal enhancement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1.5 / CEX2 | Port 1 bit 5 / PCA Channel 2 I/O | Dedicated capture/compare I/O for PCA module 2; supports edge-triggered input or PWM output |
| P1.6 / CEX3 | Port 1 bit 6 / PCA Channel 3 I/O | Dedicated capture/compare I/O for PCA module 3; enables simultaneous multi-channel PWM generation |
| P1.7 / CEX4 | Port 1 bit 7 / PCA Channel 4 I/O | Dedicated capture/compare I/O for PCA module 4; supports high-resolution timing for motor phase control |
| RST | Reset Input | Active-high reset requiring ≥2 machine cycles (12/24 oscillator periods); enables power-on and external reset recovery |
| P3.0 / RxD | Serial Input | UART receive input with framing error detection; supports asynchronous communication at variable baud rates |
| P3.1 / TxD | Serial Output | UART transmit output; works with Timer 1 or Timer 2 as baud-rate generator |
| XTAL1 | Oscillator Input | Inverting amplifier input for crystal/resonator connection; also accepts external clock source when XTAL2 is left unconnected |
| VCC | Power Supply | Primary 4.5–5.5 V supply rail; powers core, peripherals, and I/O drivers |
| VSS | Ground Reference | 0 V reference plane; must be connected before any other pin to prevent latch-up |
Key Features
| Feature | Design Value |
|---|---|
| 6-clock/12-clock CPU mode | Software-selectable via CKCON.X2 bit; enables 40 MHz-equivalent throughput at 20 MHz crystal for timing-critical firmware |
| Independent peripheral clocking | Each timer, UART, and PCA can run at fosc/6 or fosc/12 while CPU runs in 6-clock mode - optimizing speed vs. power trade-offs |
| Five-channel PCA | Hardware-accelerated PWM, input capture, and software-timed compare across five independent modules - eliminates CPU overhead in motor control loops |
| Enhanced UART | Framing error detection and automatic address recognition enable robust multi-drop RS-485 communication without software polling |
| ISP/IAP Flash programming | Serial Flash reprogramming via UART using built-in boot ROM - supports field firmware updates without removing MCU from PCB |
| Industrial temperature grade | Guaranteed operation from –40°C to +85°C in LQFP-44 package - suitable for factory automation and outdoor equipment |
Applications
| Motor Control System | Industrial PLC I/O Module |
|---|---|
Use Scenario: Closed-loop DC brushless motor commutation with Hall sensor feedback and current sensing. IC Role / Device Role / Timing Role: Real-time PWM generation, quadrature encoder counting, and interrupt-driven sensor sampling using PCA and Timer 2. Use Value: Five independent PCA channels deliver synchronized 3-phase PWM outputs with <1 µs jitter, enabling precise torque ripple reduction and efficient field-oriented control. |
Use Scenario: Modular digital input/output expansion unit with isolated 24 V DC inputs and relay/SSR outputs. IC Role / Device Role / Timing Role: Central controller managing opto-isolated input scanning, watchdog supervision, and serial Modbus RTU communication over RS-485. Use Value: Enhanced UART with automatic address recognition and framing error detection ensures reliable multi-drop communication in electrically noisy factory environments. |
| Smart Energy Meter Interface | Embedded HVAC Controller |
Use Scenario: Pulse-counting interface between utility meter kWh pulses and wireless telemetry module. IC Role / Device Role / Timing Role: High-accuracy pulse capture using PCA CEX0 input with edge-triggered timestamping and low-power sleep/wake scheduling. Use Value: Hardware capture/compare eliminates missed pulses at >10 kHz input rates and reduces firmware latency to <2 µs - critical for revenue-grade metering accuracy. |
Use Scenario: Standalone thermostat with temperature/humidity sensing, fan speed control, and IR remote decoding. IC Role / Device Role / Timing Role: Multi-tasking controller running PID loop, IR carrier demodulation (via Timer 1 gated input), and PWM fan drive simultaneously. Use Value: Dual-clock mode allows CPU to run at 6-clock for fast PID computation while UART and PCA operate at 12-clock for stable communication and smooth fan ramping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit Flash microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT89C51ED2-RLTUM | 5.5 V max supply; 64 KB Flash; no PCA; only two 16-bit timers; lacks CKCON peripheral clock control | Lower peripheral integration; unsuitable for multi-channel PWM or independent peripheral timing | Select only if higher Flash capacity is required and PCA/timing flexibility is not needed |
| STC89C52RC-PD | 5 V only; 8 KB Flash; no ISP/IAP; no PCA; single 16-bit timer; no CKCON register or 6-clock mode | Reduced feature set; no field-upgradable Flash; limited timing precision for motor control | Consider only for cost-sensitive, non-upgradable designs where basic 8051 functionality suffices |
Compared with AT89C51ED2-RLTUM and STC89C52RC-PD, the P89C51RC2FBD/01 provides unique hardware-level timing flexibility through its 5-channel PCA and per-peripheral clock control - enabling simultaneous high-resolution PWM, capture, and serial communication without CPU intervention, which is essential for deterministic real-time embedded control.
Availability
P89C51RC2FBD/01 is available at Aetrix Electronics and suitable for industrial automation, motor control, and smart metering applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature operation.
Supply support for P89C51RC2FBD/01 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The P89C51RC2FBD/01 belongs to NXP's legacy 80C51 Flash microcontroller family, designed specifically for cost-effective, high-reliability embedded control in harsh environments where deterministic timing, field firmware updates, and industrial temperature tolerance are mandatory.
FAQ
What is the maximum operating frequency of the P89C51RC2FBD/01?
The P89C51RC2FBD/01 supports up to 20 MHz in 6-clock mode (delivering 40 MHz equivalent performance) and up to 33 MHz in 12-clock mode. The actual maximum frequency depends on supply voltage (4.5–5.5 V) and ambient temperature (–40°C to +85°C). Both modes are fully supported in the P89C51RC2FBD/01 and selected via Flash configuration bit FX2 or SFR bit X2 in CKCON register.
Does the P89C51RC2FBD/01 support In-System Programming (ISP)?
Yes, the P89C51RC2FBD/01 supports In-System Programming via its built-in UART bootloader. No external programmer is required - new firmware can be downloaded directly into Flash memory while the device remains mounted on the target board. This capability is enabled by the default serial loader in ROM and requires only a simple level-shifter interface to a PC or host controller.
How many PWM channels does the P89C51RC2FBD/01 provide?
The P89C51RC2FBD/01 provides five independent PWM channels via its Programmable Counter Array (PCA), accessible on pins P1.3 (CEX0), P1.4 (CEX1), P1.5 (CEX2), P1.6 (CEX3), and P1.7 (CEX4). Each channel supports configurable duty cycle, frequency, and edge-aligned or center-aligned output - enabling simultaneous 3-phase motor control or multi-zone lighting dimming without CPU overhead.
What package type and pin count does the P89C51RC2FBD/01 use?
The P89C51RC2FBD/01 uses a 44-pin LQFP package (SOT389-1) with 10 mm × 10 mm body and 0.8 mm lead pitch. It is rated for industrial temperature range (–40°C to +85°C) and features exposed pad option for improved thermal dissipation in high-duty-cycle applications such as motor drives.
Can the P89C51RC2FBD/01 operate in low-power modes?
Yes, the P89C51RC2FBD/01 supports three low-power modes: Idle Mode (CPU halted, peripherals active), Stop Clock Mode (oscillator stopped, RAM/SFRs retained), and Power-Down Mode (oscillator and most circuitry disabled, RAM retained down to 2 V). Wake-up is possible via external interrupt (INT0/INT1) or hardware reset, with full state preservation in Idle and controlled recovery in Power-Down.
P89C51RC2FBD/01,55 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LQFP
- Series:
- 89C
- Packaging:
- Bag
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 8051
- Core Size:
- 8-Bit
- Speed:
- 33MHz
- Connectivity:
- UART/USART
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
P89C51RC2FBD/01,55 FAQ
1.How can I place an order for P89C51RC2FBD/01,55 through Aetrix?
Please submit a Request for Quotation (RFQ) for P89C51RC2FBD/01,55 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P89C51RC2FBD/01,55 reliable?
The price and inventory of P89C51RC2FBD/01,55 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P89C51RC2FBD/01,55 is usually 5 days.
3.What payment methods are accepted for P89C51RC2FBD/01,55?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P89C51RC2FBD/01,55 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P89C51RC2FBD/01,55?
P89C51RC2FBD/01,55 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P89C51RC2FBD/01,55 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P89C51RC2FBD/01,55?
For technical support, including P89C51RC2FBD/01,55 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P89C51RC2FBD/01,55 requirements.
6.How does Aetrix verify that P89C51RC2FBD/01,55 is sourced from the original manufacturer or authorized distributors?
All P89C51RC2FBD/01,55 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P89C51RC2FBD/01,55 meets industry standards.
7.What is the process for return or replacement of P89C51RC2FBD/01,55?
All P89C51RC2FBD/01,55 units undergo pre-shipment inspection (PSI). If there is an issue with P89C51RC2FBD/01,55, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P89C51RC2FBD/01,55 part is unused and in its original packaging.
Return procedure for P89C51RC2FBD/01,55:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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