ISD91260BRI

I91260BRI is Nuvoton’s Audio SoC based on ARM Cortex-M0 core running up to 48 MHz with 128 KB of flash memory and 12 KB of SRAM.

I91260BRI is equipped with a variety of peripheral devices and serial interfaces such as Timers, Watchdog Timer (WDT), Real-time Clock (RTC), Peripheral Direct Memory Access (PDMA), full range of serial interfaces (UART, SPI/SSP, I2C), PWM, GPIO, 12-bit SAR ADC Converter, LDO, Low Voltage Detector and Brown-out detector.

The core features for I91260BRI Audio SoC includes audio I/O interfaces such as I2S, DMIC input and Differential Audio PWM output.

Specifically, I91260BRI provides 21-bit precision Bridge Sense ADC.

Bridge Sense ADC:

• On Chip Calibration
• 8 steps Programmable Gain Amplifier (BSPGA)
• Programmable data output rate
• 21 bit precision @ moving average 6.4 SPS
Target Applications:

• Customer Medical Detection Device - Smart Scale, Smart thermometer
• Voice input product with Sensor Feedback - Smart Home Appliance
• Industrial IoT Sensor Bridge with Voice Feedback
Key Features:

• Core
- Arm® Cortex®-M0 processor running up to 48MHz

• Memories
- 128KB Flash
- 12KB embedded SRAM
- 4 KB Flash for user program loader ( LDROM )
- ISP / ICP / IAP programming

• Clocks
- Built-in trimmable oscillator with range of 16-48MHz
- External 32kHz crystal input for RTC function and low power system operation
- External 12MHz crystal input for precise timing operation

• Timers
- 2 channels 32-bit timer
- 2 channels 16-bit timer

• PWMs
- 4 channels 16-bit PWM or 2 sets of complementary paired PWM

• Communication Interfaces
- 2-set of UART interface
- 2-set of SPI interface
- 1-set of I²C interface

• Audio Interfaces
- Differential Audio PWM Output (DPWM), Supports Sample Rate from 8~48KHz, 0.5W drive@8ohm
- Digital MIC Input
- 1-set of I²S interface

• GPIOs
- Four I/O modes: Quasi bi-direction / Push-Pull output / Open-Drain output / Input with high impedance
- Maximal 32 GPIOs

• Peripherals
- Multi-Function Timers, WDT, RTC
- PDMA
- Built-in Low Dropout Regulator(LDO)
- Over Temperature Alarm
- 12-bit SAR ADC with 700K SPS

• Operating Characteristics
- Wide voltage range: 1.8V ~ 5.5V
- Temperature range: -40°C ~ 85°C

• Package
- LQFP-64 (7x7mm)