NXP Semiconductors LPC2106BBD48,151

Overview

LPC2106BBD48,151 from NXP Semiconductors is a 32-bit ARM7TDMI-S microcontroller with 128 kB flash, 64 kB on-chip SRAM, and 32 GPIO pins in LQFP48 package. It operates at up to 60 MHz via on-chip PLL, supports dual power domains (1.8 V core / 3.3 V I/O), and integrates two UARTs, I²C, SPI/SSP, two 32-bit timers, PWM unit, RTC, and watchdog - enabling compact embedded control in access systems and protocol gateways.

For engineers reviewing the LPC2106BBD48,151 datasheet, LPC2106BBD48,151 pinout, LPC2106BBD48,151 application, or LPC2106BBD48,151 equivalent, key selection criteria include its 64 kB RAM capacity, 5 V-tolerant I/O pins, Fast GPIO capability, hardware flow-controlled UARTs, and support for In-System Programming (ISP) and In-Application Programming (IAP) without external programming hardware.

Technical Context

The LPC2106BBD48,151 implements the ARM7TDMI-S core with Thumb instruction set for code density optimization, achieving up to 65 % smaller footprint versus ARM mode while retaining >160 % performance of a 16-bit processor on 16-bit memory. Its 128-bit-wide flash interface and accelerator enable full 60 MHz execution speed.

It features a Vectored Interrupt Controller (VIC) supporting configurable priorities across 16 vectored IRQ slots, plus FIQ and non-vectored IRQ classes. Peripheral interrupt sources include UART0/1, Timer0/1, PWM, I²C, SPI/SSP, RTC, watchdog, and three external interrupts - all mapped to dedicated VIC channels with programmable vector addresses.

Key Specifications

Pinout & Package

Package: LQFP48 (SOT313-2), 7 mm × 7 mm body, 1.4 mm height, 0.5 mm lead pitch. All pins are 5 V tolerant with TTL-level hysteresis except open-drain I²C pins (P0.2/P0.3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit ARM microcontroller applications.

Compared with LPC2106FBD48, the LPC2106BBD48,151 trades extended temperature tolerance for lower acquisition cost in controlled environments; compared with LPC2138FBD48, it omits USB and ADC to reduce BOM count and simplify layout while retaining identical core performance and memory for serial gateway use cases.

Availability

LPC2106BBD48,151 is available at Aetrix Electronics and suitable for access control systems, industrial protocol gateways, and soft modem implementations requiring stable component supply, long-term lifecycle support, and consistent electrical specifications across production batches.

Supply support for LPC2106BBD48,151 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 delivering secure, scalable solutions for automotive, industrial, IoT, and mobile applications with emphasis on energy efficiency and functional safety.

The LPC2100 series was designed specifically for cost-sensitive, space-constrained embedded control applications requiring high integration, low power, and robust serial communication - targeting point-of-sale, access control, and industrial gateway markets.

FAQ

What is the maximum operating frequency of the LPC2106BBD48,151?

The LPC2106BBD48,151 achieves a maximum CPU clock frequency of 60 MHz using its on-chip Phase-Locked Loop (PLL). The PLL has a settling time of 100 µs and accepts input frequencies from 1 MHz to 25 MHz via an external crystal connected to XTAL1/XTAL2. This 60 MHz operation is enabled by the 128-bit-wide flash interface and accelerator architecture, allowing full-speed 32-bit instruction execution without wait states.

Does the LPC2106BBD48,151 support In-System Programming (ISP)?

Yes, the LPC2106BBD48,151 supports In-System Programming via its built-in bootloader, which operates through UART0. Flash programming takes 1 ms per 512-byte line, and sector or full-chip erase requires 400 ms. This capability allows field firmware updates without removing the device from the PCB, making LPC2106BBD48,151 ideal for remote maintenance and iterative development in deployed systems.

How much SRAM does the LPC2106BBD48,151 have, and how is it used?

The LPC2106BBD48,151 integrates 64 kB of on-chip static RAM, accessible as 8-bit, 16-bit, or 32-bit wide. This SRAM is used for both program stack, heap, and data variables, and can also hold executable code for time-critical routines. Unlike external RAM, it provides zero-wait-state access and is powered separately from the I/O domain, ensuring deterministic timing for real-time tasks such as PWM generation or UART buffering.

What are the power supply requirements for the LPC2106BBD48,151?

The LPC2106BBD48,151 requires two independent power supplies: VDD(1V8) at 1.65–1.95 V for the core logic (CPU, flash, SRAM), and VDD(3V3) at 3.0–3.6 V for I/O and peripherals. The I/O pins are 5 V tolerant, allowing direct interfacing with legacy 5 V logic without level shifters. Proper decoupling capacitors must be placed near each VDD pin to maintain stability under dynamic load conditions.

Can the LPC2106BBD48,151 be debugged using JTAG?

Yes, the LPC2106BBD48,151 supports full JTAG debugging via its primary and secondary JTAG pin groups (TCK/TMS/TDI/TDO/TRST), accessible on P0.19–P0.21 and P0.27–P0.31. It also includes EmbeddedICE-RT for breakpoints and watchpoints, and the Embedded Trace Macrocell (ETM) for non-intrusive real-time instruction tracing. Debug entry is controlled by the DBGSEL pin during reset, enabling seamless integration with standard ARM debug tools.