NUVOTON I91260CRI

The I91200 series is a system-on-chip optimized for low-power audio recording and playback, integrating an ARM Cortex-M0 32-bit microcontroller core. The device features a Cortex-M0 core running at up to 50 MHz, with 64K/128K bytes of non-volatile flash memory and 12K bytes of embedded SRAM. It also incorporates a rich set of peripherals, including timers, a watchdog timer, a real-time clock, peripheral DMA, multiple serial interfaces, a PWM modulator, GPIO, LDO, SDADC, SARADC, DPWM, a brown-out detector, and an under-voltage detector. The I91200 series supports multiple power-saving modes, including a deep power-down mode with leakage current below 1μA. A micro-power 10kHz oscillator can periodically wake the device from deep power-down mode to check for other events. Standby power-down mode maintains real-time clock functionality at a current below 5μA. In terms of audio capability, the I91200 incorporates a Σ-Δ ADC with an SNR of 91dB, combined with a programmable gain amplifier and digital-domain volume control, enabling direct microphone connection. Audio output is provided by a differential Class-D amplifier capable of delivering 0.5W into an 8Ω speaker. The I91200 offers eight general-purpose I/O pins with analog functionality support. These pins can be configured to connect to an analog comparator, configured as analog current sources, or routed to the SDADC for analog-to-digital conversion. They can also be used as relaxation oscillators for capacitive touch sensing.

• ARM Cortex-M0 core operating at up to 50 MHz.
• One 24-bit SysTick timer for OS support.
• Multiple low-power sleep and power-down modes.
• Single-cycle 32-bit hardware multiplier.
• Nested Vector Interrupt Controller with 32 interrupt inputs, each with 4 priority levels.
• Serial Wire Debug supporting 2 watchpoints/4 breakpoints.
• Wide operating voltage range: 1.8V to 5.5V.
• Power Management Unit providing four-level power control.
• Deep power-down mode with leakage current below 2μA.
• Wake-up from deep power-down via dedicated wake-up pin or timed operation of internal low-power 10kHz oscillator.
• Standby power-down mode sustaining limited RAM and RTC operation with current below 5μA.
• Stop mode sustaining full SRAM with current below 10μA.
• Wake-up from any GPIO interrupt, RTC, or brown-out detector.
• Sleep mode with minimal dynamic power consumption.
• 3V LDO for powering external 3V devices.
• 64K/128K bytes flash for program code and data storage.
• Micro-cache for near-zero wait-state memory access.
• In-system programming and in-circuit programming support for application code updates.
• Flash supports 512-byte page erase.
• Configurable boundary to separate code and data flash.
• Two-wire in-circuit programming updates via Serial Wire Debug in-circuit programming interface.
• 12K bytes embedded SRAM.
• High-speed and low-speed oscillators for flexible application options without external components.
• Built-in trimable oscillator with frequency range 16–50MHz, factory-trimmed to 49.152MHz and 32.768MHz within 1% accuracy. Users can fine-tune using the built-in frequency measurement module with a 32kHz crystal or external reference clock.
• Ultra-low-power 10kHz oscillator for watchdog and wake-up from power-down or sleep operation.
• External 32kHz crystal input for RTC functionality and low-power system operation.
• External 12MHz crystal input for precision timing operation.
• Four I/O modes: quasi-bidirectional, push-pull output, open-drain output, high-impedance input.
• Optional Schmitt trigger input.
• I/O pins configurable as interrupt sources with edge/level settings.
• High drive and high sink current I/O modes supported.
• Capacitive touch sensing: 16 channels.
• Up to 32 GPIOs.
• Audio ADC.