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NXP Semiconductors PXAG30KFA,512
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- Part No.:
- PXAG30KFA,512
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-LCC (J-Lead)
- Datasheet:
-
PXAG30KFA,512.pdf
- Description:
- IC MCU 16BIT ROMLESS 44PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,474
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Product details
Overview
PXAG30KFA,512 from NXP Semiconductors (formerly Philips Semiconductors) is a 16-bit XA architecture microcontroller designed for high-performance embedded control with upward compatibility to 80C51 code. It integrates 512 B on-chip RAM, a watchdog timer, two enhanced UARTs, and operates across –40 °C to +85 °C in a 44-pin PLCC package. It targets industrial control systems requiring deterministic serial communication and external bus interfacing.
For engineers reviewing the PXAG30KFA,512 datasheet, PXAG30KFA,512 pinout, PXAG30KFA,512 application, or PXAG30KFA,512 equivalent, key selection criteria include its 20-bit address space (1 MB program/data), dual UART support with 9-bit mode and multiprocessor addressing, programmable TCLK prescaling (Osc/4, Osc/16, Osc/64), quasi-bidirectional I/O port configuration, and watchdog reset behavior with WDCON register bit definitions.
Technical Context
The PXAG30KFA,512 implements the XA 16-bit static CPU core with 24-bit address capability (configured to 20-bit in this variant), eight general-purpose 16-bit registers, and an instruction set optimized for C and real-time multitasking - including 16×16 multiply and 32/16 divide. Its memory architecture supports segmented data access, banked registers, and up to 32 vectored interrupts.
It features three independent 16-bit timers (T0, T1, T2), where T2 adds capture, auto-reload (up/down), and baud rate generation modes. The dual UARTs support simultaneous full-duplex operation with break detection, automatic address recognition, and bypassable double buffering - all synchronized to the same programmable TCLK source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Architecture | 16-bit XA core with 20-bit address bus (1 MB program/data space); upward-compatible with 80C51 instruction set and memory model. |
| RAM | 512 bytes on-chip static RAM; used for variables, stack, and data buffers without external memory dependency. |
| Operating Voltage | 2.7 V to 5.5 V; enables direct interface with legacy 5 V logic and compatibility with modern low-voltage peripherals. |
| Timers | Three 16-bit timers: T0/T1 (80C51-compatible modes + enhanced Mode 0), T2 (capture, auto-reload up/down, baud rate generator). |
| Serial Interfaces | Two UARTs (UART0 and UART1) with independent control/status registers, 9-bit mode, multiprocessor communication, and break detect. |
| Watchdog | Dedicated watchdog timer with configurable timeout via WDCON register (PRE2:PRE0 bits); generates reset on overflow with WDTOF flag. |
| I/O Ports | Four 8-bit ports (P0–P3), each with user-configurable output type (quasi-bidirectional, push-pull, open-drain, input-only) per pin. |
| Package & Temp | 44-pin PLCC (SOT187-2); industrial temperature range (–40 °C to +85 °C); no internal flash - requires external program memory (EA pin tied low). |
Pinout & Package
Package: 44-pin Plastic Leaded Chip Carrier (PLCC), SOT187-2, body size 16.5 × 16.5 × 4.0 mm, lead pitch 0.8 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 22 | VSS | Ground reference (0 V) for digital and analog circuitry; dual ground pins reduce noise coupling. |
| 23, 44 | VDD | Primary power supply (2.7–5.5 V); dual VDD pins ensure stable core and I/O voltage distribution. |
| 10 | RST | Active-low reset input; initiates hardware reset sequence, clearing SFRs and restarting execution at reset vector. |
| 20, 21 | XTAL1 / XTAL2 | Crystal oscillator inputs; supports external crystal (1–20 MHz) or external clock source for system timing. |
| 11, 13 | RxD0 / TxD0 | UART0 receive and transmit pins; support RS-232/RS-485 level-shifting and multiprocessor address filtering. |
| 6, 7 | RxD1 / TxD1 | UART1 receive and transmit pins; independent from UART0, enabling dual serial channel operation (e.g., diagnostics + fieldbus). |
| 14, 15 | INT0 / INT1 | Edge-triggered external interrupt inputs; used for fast event response (e.g., encoder pulses, safety signals). |
| 16–19 | T0 / T1/BUSW / WRL / RD | Timer inputs, bus width select, and external memory strobes; enable 8/16-bit external data bus interfacing with wait-state control. |
| 35 | EA/WAIT | External Access input latched at reset (must be LOW); later functions as active-high wait input to extend bus cycles during slow memory access. |
Key Features
| Feature | Design Value |
|---|---|
| 80C51 Code Compatibility | Full instruction set and memory mapping compatibility enables translation of existing 8051 firmware with minimal modification. |
| Programmable TCLK Prescaler | PT0/PT1 bits in SCR select Osc/4, Osc/16, or Osc/64 - enabling precise baud rate generation and consistent timer scaling across all three timers. |
| Dual UART with Multiprocessor Mode | Each UART supports 9-bit frame format and automatic address recognition (S1ADDR/S0ADDR), allowing selective wake-up in multi-node networks. |
| Configurable I/O Port Outputs | Per-port configuration registers (PnCFGA/PnCFGB) allow individual pins to be set as quasi-bidirectional, push-pull, open-drain, or input-only - eliminating external pull-ups in many cases. |
| Enhanced Timer 2 | T2 provides capture, auto-reload (up/down), and baud rate generation modes - extending functionality beyond standard 80C51 T2 while retaining register compatibility. |
| Industrial Temperature Range | Rated for –40 °C to +85 °C operation; validated across full voltage (2.7–5.5 V) and frequency range, suitable for harsh environments. |
Applications
| Industrial PLC I/O Module | Legacy System Serial Bridge |
|---|---|
|
Use Scenario: Real-time monitoring and control of sensors/actuators in programmable logic controller backplanes using Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Primary controller managing dual UARTs for master/slave communication, external memory-mapped I/O expansion, and watchdog supervision of firmware integrity. Use Value: 20-bit addressing supports large I/O mapping tables; dual UARTs enable concurrent Modbus master polling and diagnostic logging; watchdog prevents lockup during EMI events. |
Use Scenario: Protocol translation between legacy 8051-based equipment (e.g., HVAC controllers) and modern Ethernet gateways via RS-232/RS-485. IC Role / Device Role / Timing Role: Firmware-executing bridge processor handling 80C51 binary compatibility layer, UART-to-UART forwarding, and configurable baud rate generation for mismatched devices. Use Value: Identical instruction timing and register layout minimizes porting effort; TCLK prescaling allows exact baud rates for both legacy and target interfaces. |
| Motor Drive Communication Interface | Test Equipment Control Unit |
|
Use Scenario: Isolated serial interface between motor drive firmware and host PC for parameter upload/download and real-time status reporting. IC Role / Device Role / Timing Role: Dedicated UART controller with break detection and 9-bit addressing, managing time-critical command framing and error recovery. Use Value: UART1 handles drive command stream while UART0 manages diagnostics; T2 capture mode measures PWM feedback timing for synchronization verification. |
Use Scenario: Embedded controller in automated test equipment coordinating multiple instruments (DMM, signal generator) via GPIB or RS-232. IC Role / Device Role / Timing Role: Central sequencer executing test scripts, managing external memory for waveform storage, and generating precise timing triggers via T0/T1 outputs. Use Value: 16-bit timers provide sub-microsecond resolution for trigger alignment; 512 B RAM stores instrument command buffers without external SRAM. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 80C51FA-2 (NXP) | 8-bit 80C51 core; 1 kB RAM; single UART; no T2; 16-pin DIP/PLCC; max 20 MHz. | Limited to simpler control tasks; insufficient RAM and serial throughput for dual-channel protocol bridging. | Select only when cost sensitivity outweighs performance requirements and software reuse is not needed. |
| XA-G32 (NXP) | Same XA architecture; 1 kB RAM; added 16 kB on-chip ROM; identical pinout and peripheral set. | Enables standalone operation without external program memory; higher code density reduces PCB footprint and BOM count. | Choose when firmware size exceeds external memory practicality or boot reliability is critical. |
Compared with PXAG30KFA,512, the 80C51FA-2 lacks dual UARTs and scalable addressing, limiting protocol flexibility, while the XA-G32 adds on-chip ROM but retains full pin and register compatibility - making it a drop-in upgrade for memory-constrained designs.
Availability
PXAG30KFA,512 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, legacy system serial bridges, and motor drive communication interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for PXAG30KFA,512 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 company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The XA-G30 product line was developed to deliver high-performance 16-bit embedded control with seamless migration path from 80C51 designs - targeting industrial automation, test equipment, and protocol bridge applications demanding deterministic timing and robust serial communication.
FAQ
What is the maximum operating frequency of the PXAG30KFA,512?
The PXAG30KFA,512 supports external crystal or clock inputs up to 20 MHz, as specified in its AC Electrical Characteristics table. At 20 MHz, the internal TCLK can be configured to Osc/4 (5 MHz), Osc/16 (1.25 MHz), or Osc/64 (312.5 kHz) - directly determining timer resolution and UART baud rate accuracy. This frequency range ensures compatibility with legacy 80C51 timing while enabling higher throughput in XA-optimized code.
Does the PXAG30KFA,512 include on-chip flash or ROM memory?
No, the PXAG30KFA,512 does not contain any on-chip non-volatile program memory. Its EA/WAIT pin must be held LOW at reset to force external program memory access, as confirmed in the PIN DESCRIPTIONS section. All firmware executes from external EPROM or Flash memory mapped via the 20-bit address bus - a deliberate design choice to maximize flexibility in memory selection and upgrade paths.
How is the watchdog timer configured and cleared in the PXAG30KFA,512?
The PXAG30KFA,512 watchdog is controlled by the WDCON register (address 41Fh). Timeout is set via PRE2:PRE0 bits; the timer is cleared by writing specific values (0xAA then 0x55) to WFEED1 and WFEED2 registers. A watchdog timeout sets the WDTOF flag and asserts RST. This two-step feed sequence prevents accidental resets and ensures reliable failure recovery in safety-critical applications.
Can the PXAG30KFA,512 operate with a 3.3 V supply?
Yes, the PXAG30KFA,512 is fully specified for operation from 2.7 V to 5.5 V, including 3.3 V nominal systems. Its DC Electrical Characteristics table confirms valid operation across this range, and all I/O pins are 5 V tolerant when configured as inputs - enabling direct interface with both 3.3 V logic and legacy 5 V peripherals without level shifters.
What external bus configurations does the PXAG30KFA,512 support?
The PXAG30KFA,512 supports both 8-bit and 16-bit external data bus widths, selected at reset by the BUSW pin (P3.5). In 8-bit mode, P0 carries AD0–AD7 and P2 carries A8–A19; in 16-bit mode, P0 carries D0–D7, P2 carries A8–A19, and P1 carries A0–A7/WRH. This flexibility allows optimization for memory density versus pin count in space-constrained designs.
PXAG30KFA,512 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-LCC (J-Lead)
- Series:
- XA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- XA
- Core Size:
- 16-Bit
- Speed:
- 30MHz
- Connectivity:
- UART/USART
- Peripherals:
- PWM, WDT
- Number of I/O:
- 32
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
PXAG30KFA,512 FAQ
1.How can I place an order for PXAG30KFA,512 through Aetrix?
Please submit a Request for Quotation (RFQ) for PXAG30KFA,512 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 PXAG30KFA,512 reliable?
The price and inventory of PXAG30KFA,512 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PXAG30KFA,512 is usually 5 days.
3.What payment methods are accepted for PXAG30KFA,512?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PXAG30KFA,512 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PXAG30KFA,512?
PXAG30KFA,512 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PXAG30KFA,512 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 PXAG30KFA,512?
For technical support, including PXAG30KFA,512 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PXAG30KFA,512 requirements.
6.How does Aetrix verify that PXAG30KFA,512 is sourced from the original manufacturer or authorized distributors?
All PXAG30KFA,512 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 PXAG30KFA,512 meets industry standards.
7.What is the process for return or replacement of PXAG30KFA,512?
All PXAG30KFA,512 units undergo pre-shipment inspection (PSI). If there is an issue with PXAG30KFA,512, 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 PXAG30KFA,512 part is unused and in its original packaging.
Return procedure for PXAG30KFA,512:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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