VS. RX100 by Renesas The RX100 series is part of Renesas’ RX family that was launched in 2007. In the same family, there is the RX600, which is a high-performance series, and the RX200, which is the low-cost version of the RX600. The recently launched RX100 has the same CPU core as the 200 and 600, but was developed with low-power battery operated applications in mind. The RX100 has 1.56 megahertz of CPU performance and runs at very low power, both in active mode as well as in standby mode. The device comes in a variety of packages—from 40-pin to 64-pin—and all the peripherals are included within. In terms of memory, the RX100 ranges from as low as 8 kilobytes to 128 kilobytes in on-board flash, with additional data flash available.
36
STM32 by STMicroelectronics The STM32 L1 series from STMicroelectronics is based on a 32-bit ARM Cortex-M3. The device has multiple low-power modes and is available in 4 different lines: the STM32L100 Value line, STM32L151, STM32L152 (LCD), and the STM32L162 (LCD and AES-128). The device can get up to 384K of flash and up to 48K of SRAM as well as up to 12K of EEPROM. Like the RX100, the STM32 comes in multiple different packages as small as a wafer-level chip scale package. It can get up to 114 I/Os with all of the standard communication interfaces, up to 40 12-bit ADCs, and up to two 12-bit DACs. There is also an integrated DMA controller as well as an integrated LCD driver.