NXP Semiconductors has announced the expansion of its ARM9-based product portfolio with the addition of the LPC314x and LPC315x devices to the LPC31xx series. Built around a high-performance ARM926EJ processor core, the new microcontrollers (MCUs) provide several new features over the LPC313x series, including an AES decryption engine and a secure one-time-programmable (OTP) memory. Running at 270 MHz, the LPC314x also offer a 50% increase in speed over the LPC313x devices. The LPC315x devices run at 180 MHz and further add a stereo audio codec, power supply unit and a battery charger.
The LPC31xx series integrates high-speed (480 Mbps) USB 2.0 on-the-go (OTG) and advanced power management capabilities, targeting embedded designers of consumer, industrial, medical, communication and automotive infotainment products.
The LPC314x series consists of two devices: the LPC3141 and LPC3143. The LPC3141 has a secure OTP memory providing a unique ID, the ability to store secure keys/USB product ID and the option to access JTAG securely. The LPC3143 adds a 128-bit AES decryption engine, providing a mechanism to boot securely from NAND Flash, SPI Flash, SD/MMC, eMMC/eSD and Managed NAND devices.
Designed in 90 nm process, the LPC314x devices feature a 270 MHz ARM926EJ core coupled with 16 KB data cache, 16 KB instruction cache and 192 KB of on-chip SRAM. The MCUs have an 8/16-bit SRAM and SDRAM external bus interface as well as a memory card interface capable of supporting SDHC, MMC/SDIO and CE-ATA peripherals. Serial interfaces include SPI/SSI, I²C, I²S, UART, PWM and PCM (pulse code modulation) interfaces. Rounding the feature set is a 10-bit ADC, general purpose timers, WDT and multiple GPIO. For those applications that require visual interaction, the LPC314x integrates a 4/8/16-bit 6800/8080 compatible LCD interface.
The LPC315x series consists of the LPC3152 and LPC3154. The former adds a stereo audio codec with Class AB headphone amplifier, power supply unit (PSU) and Li-Ion charger to the LPC3141 feature set. The PSU allows the system to run directly from the battery voltage or the USB power voltage, providing optimised supply voltages to power the rest of the system. The built-in charger allows a Li-Ion battery to be charged from the power supplied by a USB connection or by an AC adapter. The charger also monitors for battery voltage, charge current, battery and chip temperatures. A flexible clock generation unit (CGU) provides dynamic clock gating and scaling to further optimise the system for low power. The LPC3154 adds a 128-bit AES decryption engine to the LPC3152, providing a mechanism to boot securely from NAND Flash, SPI-Flash, SD/MMC, eMMC/eSD and Managed NAND devices.
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