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NXP Semiconductors LPC1225FBD64/301,1
- Part No.:
- LPC1225FBD64/301,1
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
LPC1225FBD64/301,1.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,248
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Product details
Overview
LPC1225FBD64/301 from NXP Semiconductors is a 32-bit ARM Cortex-M0 microcontroller operating at up to 45 MHz, featuring 64 kB flash, 8 kB SRAM, a 10-bit 8-channel ADC, two analog comparators with programmable output feedback, and dual UARTs with RS-485 support - deployed in industrial metering and alarm system control units.
For engineers reviewing the LPC1225FBD64/301 datasheet, LPC1225FBD64/301 pinout, LPC1225FBD64/301 application, or LPC1225FBD64/301 equivalent, this page delivers verified package mapping (LQFP64), confirmed peripheral register-level behavior (e.g., CT32B0_MAT0 on PIO0_1), deterministic ROM-based integer division performance, and IEC-60335 Class B-certified WWDT for safety-critical firmware design.
Technical Context
The LPC1225FBD64/301 implements an ARM Cortex-M0 core with Nested Vectored Interrupt Controller (NVIC) and Serial Wire Debug (SWD), executing from flash with one wait state at 45 MHz. Its clock generation unit integrates a 12 MHz ±1 % internal RC oscillator, crystal oscillator (1–25 MHz), and PLL enabling full-speed CPU operation without external high-frequency crystals.
Digital peripherals include a 21-channel Micro DMA controller, CRC engine, SSP/SPI with FIFO, Fast-mode Plus I²C (1 Mbit/s), and four general-purpose timers (two 32-bit, two 16-bit) with capture/match capability. Analog functions comprise an 8-channel 10-bit ADC and two comparators supporting 555 timer emulation via ROSC and comparator output routing to timer match signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 45 MHz max (1-wait-state flash execution); delivers 1.51 CoreMark/MHz score for deterministic real-time control. |
| Memory | 64 kB on-chip flash (512-byte page erase for EEPROM emulation), 8 kB SRAM; supports ISP/IAP via ROM bootloader. |
| Analog Peripherals | 10-bit 8-channel ADC; two analog comparators with inputs selectable across 8 pins and outputs routable to timer match logic or GPIO. |
| Digital Interfaces | Two UARTs (one with RS-485/modem support), Fast-mode Plus I²C (1 Mbit/s, 5 V tolerant), SSP/SPI with FIFO, and 55 GPIO pins with programmable glitch filters. |
| Power & Safety | Three low-power modes (Sleep/Deep-sleep/Deep power-down); IEC-60335 Class B-certified Windowed Watchdog Timer; brownout detect with three thresholds. |
| Clock Sources | 12 MHz ±1 % internal RC oscillator (baud rate generation), 1–25 MHz crystal oscillator, PLL for CPU scaling, and 32 kHz RTC oscillator. |
| Package | LQFP64 (10 × 10 × 1.4 mm, SOT314-2); 64-pin footprint with dedicated SWDIO/SWCLK, RESET, RTCXIN/RTCXOUT, and VREF_CMP pins. |
Pinout & Package
LQFP64 package (SOT314-2), 10 mm × 10 mm body, 1.4 mm height, 0.5 mm lead pitch. Pin 1 marked by dot; thermal pad exposed on underside (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (XTALIN) | System oscillator input | Accepts 1–25 MHz crystal or external clock; required for precise timing and PLL reference. |
| 2 (XTALOUT) | System oscillator output | Drives crystal resonator; must be left unconnected if using internal RC oscillator only. |
| 3 (VREF_CMP) | Analog comparator reference | Provides stable voltage reference for both comparators; decoupling recommended. |
| 40 (RESET/PIO0_13) | Active-low reset input | External reset assertion forces processor restart and peripheral initialization; requires external pull-up in Deep power-down mode. |
| 10 (SWDIO/PIO0_25) | Serial Wire Debug I/O | Primary debug interface pin; supports bidirectional SWD communication and general-purpose I/O when debug disabled. |
| 11 (SWCLK/PIO0_26) | Serial Wire Debug clock | Clock input for SWD protocol; default function after reset; no alternate use during active debug session. |
| 57 (RTCXOUT) | 32 kHz oscillator output | Amplified output from RTC crystal circuit; used to drive external RTC load or monitor oscillator health. |
| 58 (RTCXIN) | 32 kHz oscillator input | Input to low-power RTC oscillator; floating allowed if RTC not used. |
Key Features
| Feature | Design Value |
|---|---|
| ROM-based integer division | 32-bit signed/unsigned divide routines deliver multiple times faster execution vs. software libraries, reducing flash usage and improving cycle determinism. |
| Comparator output feedback | ACMP0_O and ACMP1_O can directly trigger timer match events or emulate 555 timer monostable/astable behavior using ROSC on PIO0_29. |
| GPIO flexibility | All 55 GPIO pins support programmable pull-up, open-drain mode, digital input glitch filtering, and edge/level-sensitive interrupt generation. |
| EEPROM emulation | 512-byte flash page erase enables fine-grained wear leveling and robust data logging without external non-volatile memory. |
| Safety certification | Windowed Watchdog Timer (WWDT) qualified to IEC-60335 Class B, enabling use in household appliance control where functional safety is mandated. |
Applications
| Industrial Metering | Lighting Control |
|---|---|
Use Scenario: Smart electricity/water meters requiring tamper-resistant data logging, pulse counting, and secure communication over RS-485. IC Role / Device Role / Timing Role: Main system controller managing ADC sampling of sensor signals, UART-driven DLMS/COSEM protocol stack, and RTC-stamped event logging. Use Value: 64 kB flash accommodates encrypted firmware and tariff tables; ROM division accelerates energy calculation; WWDT ensures fail-safe meter reset on firmware hang. |
Use Scenario: LED driver modules with dimming profiles, thermal monitoring, and DALI or 0–10 V interface compliance. IC Role / Device Role / Timing Role: Real-time PWM generator with synchronized ADC reads for temperature/current feedback and UART-based configuration updates. Use Value: Two UARTs enable simultaneous DALI bus and debug port; 10-bit ADC resolves current sense precision; GPIO glitch filters suppress EMI-induced false triggers. |
| Alarm Systems | White Goods |
Use Scenario: Intrusion detection panels interfacing PIR sensors, door contacts, siren drivers, and GSM modem via UART. IC Role / Device Role / Timing Role: Central security processor handling sensor polling, alarm state machine, keypad scanning, and serial modem control. Use Value: 55 GPIO support direct connection to 20+ zone inputs and outputs; Deep-sleep mode extends battery backup runtime; WAKEUP pin (PIO1_3) enables instant wake from motion events. |
Use Scenario: Washing machine main control board managing motor commutation, water level sensing, heater control, and user interface. IC Role / Device Role / Timing Role: Primary MCU coordinating ADC-based pressure/temperature readings, PWM-driven triac control, and I²C-connected display. Use Value: Fast-mode Plus I²C supports noise-immune display communication; comparator outputs emulate hardware-based overtemperature shutdown; 3.3 V tolerance simplifies level-shifting with legacy sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LPC1226FBD64/301 | 96 kB flash, same 8 kB SRAM, identical peripherals and pinout. | Supports larger firmware images (e.g., OTA update stacks, extended crypto libraries) without changing PCB layout. | Select when firmware size exceeds 64 kB but all other requirements match LPC1225FBD64/301. |
| LPC1115FBD48/301 | ARM Cortex-M0 core, 32 kB flash, 4 kB SRAM, LQFP48 package, no ROSC or comparator output feedback. | Limited to simpler control tasks (e.g., basic sensor node); lacks 555 timer emulation and WWDT Class B certification. | Choose for cost-sensitive, space-constrained designs where safety certification and analog comparator routing are unnecessary. |
Compared with LPC1226FBD64/301, the LPC1225FBD64/301 trades flash capacity for lower cost and smaller code footprint; versus LPC1115FBD48/301, it adds critical safety features, analog flexibility, and pin count - making it the minimal viable option for certified industrial control.
Availability
LPC1225FBD64/301 is available at Aetrix Electronics and suitable for industrial metering, lighting control, and alarm systems requiring stable component supply, long-term manufacturability, and NXP's documented lifecycle support.
Supply support for LPC1225FBD64/301 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, with deep expertise in ARM-based microcontrollers and safety-certified peripherals.
The LPC122x product line was designed specifically for cost-sensitive, safety-aware industrial control applications - emphasizing deterministic real-time performance, integrated analog functionality, and IEC-60335 compliance without external components.
FAQ
What is the maximum operating frequency of the LPC1225FBD64/301?
The LPC1225FBD64/301 operates at a maximum CPU frequency of 45 MHz when executing from flash memory with one wait state. At zero wait states, the maximum frequency is 30 MHz. This specification is validated in the official NXP datasheet Rev. 2 (26 August 2011) and confirmed by CoreMark benchmarking at 1.51 points per MHz.
Does the LPC1225FBD64/301 support in-system programming (ISP)?
Yes, the LPC1225FBD64/301 supports In-System Programming via its on-chip bootloader, enabling firmware updates through UART0 or USB (when used with external bridge). The ROM-based ISP handler requires no user flash space and is activated by asserting a LOW on PIO0_12 during reset - a feature fully documented in the LPC122x user manual.
How many analog comparator outputs does the LPC1225FBD64/301 provide, and how are they used?
The LPC1225FBD64/301 provides two analog comparator outputs: ACMP0_O (on PIO0_27) and ACMP1_O (on PIO0_28). Both are high-current GPIO pins and can be routed to trigger timer match signals or emulate 555 timer behavior using the ROSC function on PIO0_29 - a capability explicitly defined in the "Analog peripherals" section of the datasheet.
Is the LPC1225FBD64/301 pin-compatible with other LPC122x variants in LQFP64?
Yes, the LPC1225FBD64/301 shares identical pinout, electrical characteristics, and package (SOT314-2 LQFP64) with all other LPC122x devices in the 64-pin variant, including LPC1224/1226/1227. This allows direct substitution within the same family when flash/SRAM requirements align - confirmed by Table 1 and Table 2 in the ordering information section.
What safety certifications apply to the LPC1225FBD64/301's watchdog timer?
The Windowed Watchdog Timer (WWDT) in the LPC1225FBD64/301 is certified to IEC-60335 Class B, validating its suitability for household and similar appliances requiring functional safety. This certification is explicitly stated in the "Digital peripherals" feature list and supported by the WWDT's windowed timeout mechanism and reset-on-failure behavior.
LPC1225FBD64/301,1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LQFP
- Series:
- LPC1200
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 45MHz
- Connectivity:
- I2C, IrDA, Microwire, SPI, SSI, SSP, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, WDT
- Number of I/O:
- 55
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
LPC1225FBD64/301,1 FAQ
1.How can I place an order for LPC1225FBD64/301,1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LPC1225FBD64/301,1 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 LPC1225FBD64/301,1 reliable?
The price and inventory of LPC1225FBD64/301,1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LPC1225FBD64/301,1 is usually 5 days.
3.What payment methods are accepted for LPC1225FBD64/301,1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LPC1225FBD64/301,1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LPC1225FBD64/301,1?
LPC1225FBD64/301,1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LPC1225FBD64/301,1 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 LPC1225FBD64/301,1?
For technical support, including LPC1225FBD64/301,1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LPC1225FBD64/301,1 requirements.
6.How does Aetrix verify that LPC1225FBD64/301,1 is sourced from the original manufacturer or authorized distributors?
All LPC1225FBD64/301,1 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 LPC1225FBD64/301,1 meets industry standards.
7.What is the process for return or replacement of LPC1225FBD64/301,1?
All LPC1225FBD64/301,1 units undergo pre-shipment inspection (PSI). If there is an issue with LPC1225FBD64/301,1, 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 LPC1225FBD64/301,1 part is unused and in its original packaging.
Return procedure for LPC1225FBD64/301,1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LPC1225FBD64/301,1 Tags
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ATTINY4-TSHR
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