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Bluetooth Low Energy 5.3 transceiver integrating Controller and Host layers

• Supported data rates: 1 Mbps, 2 Mbps, Long Range (500 kbps, 125 kbps)

• TX power: -20 dBm to +7 dBm

• -97 dBm sensitivity (in 1 Mbps mode)

• -93 dBm sensitivity (in 2 Mbps mode)

• -101 dBm sensitivity (in Long Range 500 kbps mode)

• -103 dBm sensitivity (in Long Range 125 kbps mode)

• TX current: 6.3 mA @ 0 dBm, 1 Mbps, 64 MHz

• RX current: 5.3 mA @ 1 Mbps, 64 MHz

ARM^®Cortex^®-M4F 32-bit micro-processor with floating point support

• Up to 96 MHz clock frequency

• Built-in Memory Protection Unit (MPU) supporting eight programmable regions

• Hardware Floating Point Unit (FPU)

• Built-in Nested Vectored Interrupt Controller (NVIC)

• Non-maskable Interrupt (NMI) input

• Serial Wire Debug (SWD) with 16 breakpoints, two watchpoints, and a debug timestamp counter

• 56 µA/MHz CoreMark running from Flash @ 3.3 V, 64 MHz

On-chip memory

• ROM for chip bootloader, system drivers, and Bluetooth LE Protocol Stack code

• 256 KB RAM for data and instruction code, with retention capabilities in sleep mode

• Flash for code, system parameter configuration, and user data (GR5525I0NI: external Flash，GR5525IENI: 512KB，GR5525RGNI: 1MB）

Digital peripherals

• Two general-purpose DMA engines, each with six channels and up to 16 programmable request/trigger sources

Analog peripherals

• One 13-bit Sense ADC with a sampling rate of 1 Msps. It supports up to eight external I/O channels and three internal signal channels

• Built-in die temperature and voltage sensors

• Low-power comparator, supporting wakeup from sleep mode

Flexible serial peripherals

• Four UART modules up to 2 Mbps with all modules supporting flow control and IrDA

• Four I2C modules for peripheral communication, up to 3.4 MHz

• One 8-bit/16-bit/32-bit SPI master interface and one SPI slave interface for host communication

• Two I2S interfaces (one I2S master interface and one I2S slave interface)

• PDM interface with hardware sampling rate converter

• One Dual-lane SPI (DSPI) interface for display, with MIPI DBI Type-C support

• Three Quad SPI (QSPI) interfaces, up to 48 MHz; supporting direct access via memory mapping when connecting with external NOR Flash

Security

• Complete secure computing engine:

  • AES 128-bit/192-bit/256-bit symmetric encryption (ECB, CBC)

  • Hash-based Message Authentication Code (HMAC-SHA256)

  • PKC

  • TRNG

• Comprehensive security operation mechanism:

  • Secure boot

  • Encrypted firmware runs directly from Flash

  • eFuse for encrypted key storage

  • Differentiate application data key and firmware key, supporting one data per device/product

I/O peripherals

• Up to 50 multiplexed I/O pins in total

  • Up to 34 general-purpose I/O (GPIO) pins

  • Up to eight always-on I/O (AON IO) pins, supporting wakeup from sleep mode

  • Up to eight mixed signal I/O (MSIO) pins, configurable to be digital/analog signal interfaces

Timer

• Two general-purpose, 32-bit timer modules

• A dual timer module composed of two programmable 32-bit or 16-bit down counters

• An internal sleep timer that can be used to wake the device up from sleep mode

• Two PWM modules with edge alignment mode and center alignment mode, each with three channels

• Two real-time counters (RTC): one RTC and one Calendar

Power management

• On-chip DC-DC to provide RF analog voltage and supply core LDO

• On-chip I/O LDO to provide I/O voltage and supply external components; maximum I/O LDO drive strength: 30 mA

• Programmable thresholds for brownout detection (BOD)

• Supply voltage: 2.4 V – 3.8 V

• I/O voltage: 1.8 V – 3.6 V

Low-power consumption

• Sleep mode: 7.3 µA (Typical) at 3.3 V VBAT input with SRAM retention on and LFXO_32K running; woken up by eight sources of always-on domain

• Ultra deep sleep mode: 5.0 µA (Typical); internal power (all SRAM included) and LFXO_32K removed from entire chip except always-on domain; woken up by Sleep Timer and AON GPIOs

• OFF mode: 200 nA (Typical); nothing on except VBAT, and chip in reset mode

Packages

• QFN68: 7.0 mm * 7.0 mm * 0.85 mm, 0.35 mm pitch

• QFN56: 7.0 mm * 7.0 mm * 0.75 mm, 0.4 mm pitch

Operating temperature range: -40 °C to +85 °C