NXP半导体围绕16/32位的ARM7TDMI-S CPU内核来设计LPC2420/LPC2460微控制器，该CPU内核带有实时调试接口，包含JTAG和嵌入式跟踪。LPC2420/LPC2460微控制器没有Flash。LPC2460能够执行32位ARM和16位Thumb指令。LPC2420/LPC2460支持这两种指令集意味着工程师可以针对性能或代码大小，在子程序级下选择优化他们的应用。当内核在Thumb状态下执行指令时，它可将代码规模降低超过30 ，性能的损失却很小；而在ARM 状态下执行指令时，内核的性能达到最大化。-NXP Semiconductors around the 16/32 bit ARM7TDMI-S CPU core to design LPC2420/LPC2460 micro-controller, the CPU core with real-time debug interface, including JTAG and embedded trace. LPC2420/LPC2460 micro-controller does not have Flash. LPC2460 able to perform 32-bit ARM and 16-bit Thumb instruction. LPC2420/LPC2460 supports two kinds of instruction sets means engineers can address the performance or code size, in the subroutine-level choose to optimize their applications. When the kernel in the Thumb state execution, it can reduce the code size of more than 30　performance loss is small　while in a state of implementation of the ARM instruction, to maximize the performance of the kernel.