Extended mcu range leverages ST’s ultra low power technology

There are three variants of the STM8L, the STM8L151, the STM8L152 and the STM8L162. Each of the devices has 64 Kbytes of Flash memory, doubling the maximum program/data memory previously available. SRAM density has been increased to 4Kbytes, while the STM8L152 also adds an enhanced lcd controller that supports larger segments. According to ST, the STM8L162 is the first device in a new line featuring on chip 128bit AES encryption. All the new devices feature an enhanced real time clock module offering sub second accuracy, as well as support for calibration, enabling increased precision in applications requiring accurate synchronisation. Applications include utility metering and use within rf networks. The hardware rtc and its associated automatic wake up unit have combined current consumption below 1microamp. The STM8L devices incorporate a 16channel touch controller designed to provide capacity for 16 individual touch buttons or a combination of up to 10 buttons plus one rotary sensor. The entire range is built using ST's EnergyLite ultra low power platform which combines a proprietary 130nm ultra low leakage process with eeprom and, according to ST achieves dynamic current consumption as low as 150uA/MHz. EnergyLite devices implement a voltage regulator capable of maintaining low operating current at low supply voltages and the full cpu performance is maintained up to the maximum operating frequency at any supply voltage from 1.65 to 3.6V. Integrated analogue peripherals are fully functional at supply voltages down to 1.8V. The platform also implements multiple power management modes - including a 5.1uA low power run mode, 3.0uA low power wait mode, 1.2uA active halt with full rtc and down to 350nA halt mode. The device can wake from halt within 4us, enabling frequent use of the lowest power mode.