MCUs offer industry's lowest power consumption at 1MHz

Data transfer controller, event link controller and data operation circuit perform data processing and transfer, and implement long-interval timers, without CPU intervention. These innovative snooze mode functions operate without CPU intervention in standby mode and reduce power consumption by approximately 30% in products such as fire detectors, gas detectors, broken glass detectors and security systems (human sensors).

The MCUs allow dynamic switching between low-power and high-speed operation modes in order to match the system status. Low-power operation mode has a typical operating current of just 124μA from a supply voltage of 1.8-3.6V and an operating frequency of 1MHz, which Renesas say is far lower than competing products. Wake-up from stop-mode takes a maximum of just 4μs when the 4MHz on-chip oscillator clock is used as the main system clock. This cuts power consumption during wake-up and enables the MCU to contribute to the overall power efficiency of the system.

Depending on the selected package, the RL78/I1D devices integrate an ADC with up to seventeen channels, two analogue comparators and four differential input op amps, each with two input pins and one output pin. By combining all of these analogue peripheral functions on a single chip, the MCUs contribute to lower system cost and size.

The RL78/I1D group is comprised of 13 versions with package pin counts 20 to 48 and on-chip flash memory capacities of 8, 16 and 32kB.