EFM8BB31F32I

Part: EFM8BB31F32G-A-QFN32R — Silicon Labs

Type: 8-bit Microcontroller

Description: A performance line 8-bit microcontroller with a pipelined 8051 core operating at up to 50 MHz, featuring 32 kB Flash, 2304 bytes RAM, 12-bit ADC, two 12-bit DACs, and various communication interfaces, ideal for general-purpose embedded applications.

Operating Conditions:

• Supply voltage: 2.2–3.6 V
• Operating temperature: -40 to 85 °C
• Max operating frequency: 50 MHz

Key Specs:

• Core: Pipelined 8-bit CIP-51
• Flash Memory: 32 kB (user-accessible)
• RAM: 2304 bytes (including 256 bytes 8051 RAM and 2048 bytes XRAM)
• ADC Resolution: 12-bit/10-bit
• DACs: 2 x 12-bit
• Digital I/O Pins: Up to 29 multifunction
• Internal Oscillator Accuracy: ±2% (49 MHz and 24.5 MHz)
• Max SPI Speed: 12 Mbps

Features:

• Fully compatible with standard 8051 instruction set
• In-system reprogrammable flash memory
• Internal LDO regulator, Power-on reset, and brownout detectors
• Up to 25 pins 5 V tolerant under bias
• Flexible peripheral crossbar
• Internal temperature sensor
• 2 x UART, 1 x SPI, 1 x SMBus/I2C (Master/Slave)
• I2C High-Speed Slave (up to 3.4 Mbps)
• 4 Configurable Logic Units
• 6-channel programmable counter array (PCA)
• 6 x 16-bit general-purpose timers
• Independent watchdog timer
• On-chip, non-intrusive debugging
• Pre-programmed UART bootloader
• AEC-Q100 qualified (for A-grade variants)

Applications:

• Consumer electronics
• Precision instrumentation
• Power management and control
• Industrial control and automation
• Smart sensors
• Automotive control

Package:

• QFN32-GI
• QFP32
• QFN24-GI
• QSOP24
• QFN32-AI
• QFN24-AI

• Pipelined 8-bit 8051 MCU Core with 50 MHz operating frequency
• Up to 29 multifunction I/O pins
• One 12-bit/10-bit ADC
• Four 12-bit DACs with synchronization and PWM capabilities
• Two low-current analog comparators with built-in reference DACs
• Internal temperature sensor
• Internal 49 MHz and 24.5 MHz oscillators accurate to ±2%
• Four channels of Configurable Logic
• 6-channel PWM / PCA
• Six 16-bit general-purpose timers
• Industrial control and automation
• Smart sensors
• Automotive control

All electrical parameters in all tables are specified under the conditions listed in Table 4.1 Recommended Operating Conditions on page 19, unless stated otherwise.

Stresses above those listed in Table 4.21 Absolute Maximum Ratings on page 40 may cause permanent damage to the device. This is a stress rating only and functional operation of the devices at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. For more information on the available quality and reliability data, see the Quality and Reliability Monitor Report at http://www.silabs.com/ support/quality/pages/default.aspx.

Table 4.21. Absolute Maximum Ratings

1. Exposure to maximum rating conditions for extended periods may affect device reliability.

2. In certain package configurations, the VIO and VDD supplies are bonded to the same pin.

Table 4.1. Recommended Operating Conditions

1. All voltages with respect to GND

2. In certain package configurations, the VIO and VDD supplies are bonded to the same pin.

3. I/O have reduced current drive/sink capabilities at lower VIO levels. See 4.1.16 Port I/O for additional information.

Figure 7.1. Package Drawing

Table 7.1. Package Dimensions

1. All dimensions shown are in millimeters (mm) unless otherwise noted.
2. Dimensioning and Tolerancing per ANSI Y14.5M-1994.
3. This drawing conforms to JEDEC Solid State Outline MO-220.
4. Recommended card reflow profile is per the JEDEC/IPC J-STD-020C specification for Small Body Components.

Min

Typ

Max