LPC2923FBD100,551

Microcontrollers Overview

The LPC2923FBD100,551 is an ARM9-based microcontroller featuring a 125 MHz ARM968E-S core with 16 kB ITCM and 16 kB DTCM. It includes 256 kB flash memory, 24 kB SRAM, and 16 kB EEPROM. Connectivity options include USB 2.0 full-speed device controller, dual CAN controllers, dual LIN masters, two UARTs with RS-485 support, three Q-SPIs, and two I2C interfaces. The device integrates dual 10-bit ADCs, four PWMs, quadrature encoder interface, and multiple timers. It operates on dual power supplies (1.8 V core, 3.3 V I/O) within a 100-pin LQFP package.

Microcontrollers Feature Summary

• Integrated ARM968E-S processor with TCM blocks for high-performance real-time execution
• Comprehensive connectivity suite including USB 2.0, CAN, LIN, and multiple serial interfaces
• Flexible clock generation unit enabling dynamic power management and independent peripheral clocking
• Dual-master GPDMA controller supporting efficient data transfers across memory and peripherals

Microcontrollers Applications

• Consumer electronics requiring embedded control and communication
• Industrial automation systems utilizing CAN and LIN protocols
• Communication gateways and protocol converters integrating USB and Ethernet capabilities

Microcontrollers Procurement Notes

Verify the specific ordering suffix matches the required package and temperature range. Confirm that the 256 kB flash variant corresponds to the LPC2923 designation rather than the 128 kB or 512 kB alternatives. Ensure compatibility with the 1.8 V core and 3.3 V I/O voltage requirements during system design validation.

Microcontrollers Selection Notes

Select this component when an ARM9 architecture is required for complex algorithm processing alongside robust networking features. Consider the integrated EEPROM for non-volatile parameter storage needs. Evaluate the pin count and peripheral density against application constraints to ensure optimal resource utilization without over-specifying hardware capabilities.

Microcontrollers Part Context

This part belongs to the LPC292x family of ARM9 microcontrollers designed for consumer, industrial, and communication markets. It shares architectural similarities with the LPC2921 and LPC2925, differing primarily in onboard flash memory capacity and SRAM configuration. The family emphasizes low power consumption through flexible clock gating while maintaining high performance via the multilayer AHB bus infrastructure.

Microcontrollers Replacement Considerations

LPC2921FBD100 offers identical functionality with reduced flash memory. LPC2925FBD100 provides increased flash and SRAM capacities. Verify software compatibility and memory mapping adjustments when migrating between these variants within the same product line.

Microcontrollers FAQ

How does the LPC2923 handle power management?

The device utilizes a highly configurable Power Management Unit (PMU) and Clock Generation Unit (CGU) to provide dynamic clock gating and scaling for individual modules, optimizing system power consumption.

What debug interfaces are supported?

The LPC2923 supports standard ARM test and debug interfaces, including IEEE 1149.1 boundary-scan test logic and ETM/ETB debug functions for real-time trace capability.

Can the LIN interfaces be used as standard UARTs?

Yes, the two LIN master controllers can be configured as UART interfaces, providing two additional UART channels with full hardware support.