NUVOTON I91260RI

The ISD91200 series is a system-on-chip product optimized for low power, audio record and playback with an embedded ARM® Cortex™-M0 32-bit microcontroller core. The ISD91200 device embeds a Cortex™-M0 core running up to 50 MHz with 64K/128K byte of non-volatile flash memory and 12K-byte of embedded SRAM. It also comes equipped with a variety of peripheral devices, such as Timers, Watchdog Timer (WDT), Real-time Clock (RTC), Peripheral Direct Memory Access (PDMA), a variety of serial interfaces (UART, SPI/SSP, I²C, I²S), PWM modulators, GPIO, LDO, SDADC, SARADC, DPWM, Low Voltage Detector and Brown-out detector. The ISD91200 comes equipped with a rich set of power saving modes including a Deep Power Down (DPD) mode drawing less than 1μA. A micro-power 10KHz oscillator can periodically wake up the device from deep power down to check for other events. Standby Power Down (SPD) mode can maintain a real time clock function with less than 5μA. For audio functionality the ISD91200 includes a Sigma-Delta ADC with 91dB SNR performance coupled with a Programmable Gain Amplifier (PGA with 0 - 6/12dB gain) and volume control (36dB to -108dB) in digital domain to enable direct connection of a microphone. Audio output is provided by a Differential Class D amplifier (DPWM) that can deliver 0.5W of power to an 8Ω speaker. The ISD91200 provides eight analog enabled general purpose IO pins (GPIO). These pins can be configured to connect to an analog comparator, can be configured as analog current sources or can be routed to the SDADC for analog conversion. They can also be used as a relaxation oscillator to perform capacitive touch sensing.

• ARM® Cortex™-M0 core running up to 50 MHz for normal speed.
• One 24-bit System tick timer for operating system support.
• Supports a variety of low power sleep and power down modes.
• Single-cycle 32-bit hardware multiplier.
• NVIC (Nested Vector Interrupt Controller) for 32 interrupt inputs, each with 4-levels of priority.
• Serial Wire Debug (SWD) supports with 2 watchpoints/4 breakpoints.
• Wide operating voltage range from 1.8V to 5.5V.
• Power management Unit (PMU) providing four levels of power control.
• Deep Power Down (DPD) mode with sub micro-amp leakage (<2μA).
• Wakeup from Deep Power Down via dedicated WAKEUP pin or timed operation from internal low power 10KHz oscillator.
• Standby current in SPD mode with limited RAM (256byte SBRAM) retention and RTC operation <5μA.
• Standby current in STOP mode with full SRAM retention <10μA.
• Wakeup from Standby can be from any GPIO interrupt, RTC or BOD.
• Sleep mode with minimal dynamic power consumption.
• 3V LDO for operation of external 3V devices such as serial flash.
• 64K/128K bytes Flash EPROM for program code and data storage.
• Mini-cache to maintain near zero-wait state memory access.
• Support In-system program (ISP) and In-circuit program (ICP) application code update 512 byte page erase for flash.
• Configurable boundary to delineate code and data flash.
• Support 2 wire In-circuit Programming (ICP) update from SWD ICE interface
• 12K bytes embedded SRAM.
• High speed and low speed oscillators providing flexible selection for different applications. No external components necessary. Built-in trimmable oscillator with range of 16 - 50MHz. Factory trimmed within 1% to settings of 49.152MHz and 32.768MHz. User trimmable with in-built frequency measurement block (OSCFM) using reference clock of 32kHz crystal or external reference source.
• Ultra-low power (<1uA) 10kHz oscillator for watchdog and wakeup from power-down or sleep operation.
• External 32kHz crystal input for RTC function and low power system operation. External 12 MHz crystal input for precise timing operation.
• Four I/O modes: Quasi bi-direction + Push-Pull output, Open-Drain output, Input only with high impendence, Schmitt trigger input selectable.
• I/O pin can be configured as interrupt source with edge/level setting. Supports High Driver and High Sink IO mod