Part: SAM D21E / SAM D21G / SAM D21J — Microchip Type: 32-bit ARM Cortex-M0+ Microcontroller Description: Low-power 32-bit ARM Cortex-M0+ microcontrollers operating at up to 48MHz, with up to 256KB Flash and 32KB SRAM, featuring extensive peripherals including USB 2.0, I2C up to 3.4MHz, SPI, USART, 12-bit ADC, and 10-bit DAC.

Operating Conditions:

• Supply voltage: 1.62V - 3.63V
• Max CPU frequency: 48MHz

Absolute Maximum Ratings:

Key Specs:

• CPU: ARM Cortex-M0+
• Max CPU frequency: 48MHz
• Flash memory: 32KB to 256KB
• SRAM memory: 4KB to 32KB
• ADC resolution: 12-bit, 350ksps
• DAC resolution: 10-bit, 350ksps
• I2C speed: Up to 3.4MHz
• USB interface: Full-speed (12Mbps) USB 2.0

Features:

• Single-cycle hardware multiplier
• Micro Trace Buffer (MTB)
• Power-on reset (POR) and brown-out detection (BOD)
• Internal and external clock options with DFLL48M and FDPLL96M
• 12-channel Direct Memory Access Controller (DMAC)
• 12-channel Event System
• Up to six Serial Communication Interfaces (SERCOM) configurable as USART, I2C, SPI, LIN slave
• Peripheral Touch Controller (PTC) with up to 256-channel capacitive touch sensing
• Two-pin Serial Wire Debug (SWD) interface
• Idle and standby sleep modes with SleepWalking peripherals

Applications:

Package:

• 64-pin TQFP, QFN, UFBGA (SAM D21J)
• 48-pin TQFP, QFN, WLCSP (SAM D21G)
• 32-pin TQFP, QFN, WLCSP (SAM D21E)

• Processor

• -ARM Cortex-M0+ CPU running at up to 48MHz

• Single-cycle hardware multiplier

• Micro Trace Buffer (MTB)

• Memories

• -32/64/128/256KB in-system self-programmable Flash

• -4/8/16/32KB SRAM Memory

• System

• -Power-on reset (POR) and brown-out detection (BOD)

• -Internal and external clock options with 48MHz Digital Frequency Locked Loop (DFLL48M) and 48MHz to 96MHz Fractional Digital Phase Locked Loop (FDPLL96M)

• -External Interrupt Controller (EIC)

• -16 external interrupts

• -One non-maskable interrupt

• -Two-pin Serial Wire Debug (SWD) programming, test and debugging interface

• Low Power

• -Idle and standby sleep modes

• -SleepWalking peripherals

• Peripherals

• -12-channel Direct Memory Access Controller (DMAC)

• -12-channel Event System

• -Up to five 16-bit Timer/Counters (TC), configurable as either:

• One 16-bit TC with two compare/capture channels

• One 8-bit TC with two compare/capture channels

• One 32-bit TC with two compare/capture channels, by using two TCs

• -Three 24-bit Timer/Counters for Control (TCC), with extended functions:

• Up to four compare channels with optional complementary output

• Generation of synchronized pulse width modulation (PWM) pattern across port pins

• Deterministic fault protection, fast decay and configurable dead-time between complementary output

• Dithering that increase resolution with up to 5 bit and reduce quantization error

• -32-bit Real Time Counter (RTC) with clock/calendar function

• -Watchdog Timer (WDT)

• -CRC-32 generator

• -One full-speed (12Mbps) Universal Serial Bus (USB) 2.0 interface

• Embedded host and device function

• Eight endpoints

• -Up to six Serial Communication Interfaces (SERCOM), each configurable to operate as either:

• USART with full-duplex and single-wire half-duplex configuration

• I2C up to 3.4MHz

• SPI

• LIN slave

• -One two-channel Inter-IC Sound (I 2 S) interface

• -One 12-bit, 350ksps Analog-to-Digital Converter (ADC) with up to 20 channels

• Differential and single-ended input

• 1/2x to 16x programmable gain stage

• Automatic offset and gain error compensation

• Oversampling and decimation in hardware to support 13-, 14-, 15- or 16-bit resolution

• -10-bit, 350ksps Digital-to-Analog Converter (DAC)

• -Two Analog Comparators (AC) with window compare function

• -Peripheral Touch Controller (PTC)

• 256-Channel capacitive touch and proximity sensing

• I/O

• -Up to 52 programmable I/O pins

• Drop in compatible with SAM D20

• Packages

• -64-pin TQFP, QFN, UFBGA

• -48-pin TQFP, QFN, WLCSP

• -32-pin TQFP, QFN, WLCSP

• Operating Voltage

• -1.62V - 3.63V

SAMD21G18A – QFN48/TQFP48 Pinout

Notes

• Pin numbers extracted directly from the QFN48/TQFP48 package diagram for SAM D21G variant.
• SAMD21G18A is the 48-pin variant of the SAM D21 family.
• Analog pins (PB00–PB09, PA04–PA07) support ADC/DAC functions.
• Multiple VDDIO and GND pins distributed for power distribution and grounding.
• VDDANA and GNDANA are dedicated analog supply pins.
• PA00 and PA01 are oscillator pins (XIN32/XOUT32).

The following Table summarizes the thermal resistance data depending on the package.

Table 8-1. Thermal Resistance Data