NXP LPC2939 MCU USB接口方案
NXP公司的LPC2939是集成了两个TCM 的ARM968E-S CPU 核的MCU,工作频率高达125MHz,并集成了全速USB 2.0主/OTG/设备控制器,CAN和LIN,56kB SRAM,768kB闪存以及外接存储器接口,三个10位ADC,多个串行和并行接口.主要用在消费类电子,工业,医疗和通信市场.本文介绍了LPC2939主要特性, 方框图,以及各种USB,USB OTG接口方框图．
LPC2939: ARM9 microcontroller with CAN, LIN, and USB
The LPC2939 combine an ARM968E-S CPU core with two integrated TCM blocks operating at frequencies of up to 125 MHz, Full-speed USB 2.0 Host/OTG/Device controller, CAN and LIN, 56 kB SRAM, 768 kB flash memory, external memory interface,three 10-bit ADCs, and multiple serial and parallel interfaces in a single chip targeted at consumer, industrial, medical, and communication markets. To optimize system power
consumption, the LPC2939 has a very flexible Clock Generation Unit (CGU) that provides dynamic clock gating and scaling.
LPC2939主要特性和优势:
ARM968E-S processor running at frequencies of up to 125 MHz maximum.
Multilayer AHB system bus at 125 MHz with four separate layers.
On-chip memory:
Two Tightly Coupled Memories (TCM), 32 kB Instruction (ITCM), 32 kB Data TCM (DTCM)
Two separate internal Static RAM (SRAM) instances; 32 kB SRAM and 16 kB SRAM
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