LPC3220/3230/3240/3250芯片數據手冊

　　The LPC3220/30/40/50 embedded microcontrollers were designed for low power， high

　　performance applications. NXP achieved their performance goals using a 90 nanometer

　　process to implement an ARM926EJ-S CPU core with a vector floating point co-processor

　　and a large set of standard peripherals including USB On-The-Go. The

　　LPC3220/30/40/50 operates at CPU frequencies of up to 266 MHz.

　　The NXP implementation uses a ARM926EJ-S CPU core with a Harvard architecture，

　　5-stage pipeline， and an integral Memory Management Unit （MMU）。 The MMU provides

　　the virtual memory capabilities needed to support the multi-programming demands of

　　modern operating systems. The ARM926EJ-S also has a hardware based set of DSP

　　instruction extensions， which includes single cycle MAC operations， and hardware based

　　native Jazelle Java Byte-code execution. The NXP implementation has a 32 kB instruction

　　cache and a 32 kB data cache.

　　For low power consumption， the LPC3220/30/40/50 takes advantage of NXP’s advanced

　　technology development to optimize intrinsic power and uses software controlled

　　architectural enhancements to optimize application based power management.

　　The LPC3220/30/40/50 also includes 256 kB of on-chip static RAM， a NAND flash

　　interface， an Ethernet MAC， an LCD controller that supports STN and TFT panels， and an

　　external bus interface that supports SDR and DDR SDRAM as well as static devices. In

　　addition， the LPC3220/30/40/50 includes a USB 2.0 full-speed interface， seven UARTs，

　　two I2C-bus interfaces， two SPI/SSP ports， two I2S-bus interfaces， two single output

　　PWMs， a motor control PWM， six general purpose timers with capture inputs and

　　compare outputs， a Secure Digital （SD） interface， and a 10-bit Analog-to-Digital Converter

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