50.8 Rev.B - 11/2015

Section	Changes
Introduction	Updated to 2.46 Coremark/MHz
NVM Software Calibration Area Mapping	Temperature calibration content removed.
Processor and Architecture	Editorial update.
Oscillator Pinout	Recommendation for XOSC32 jitter optimization added.
Power Supply and Start-Up Considerations	VLCD has two alternative functions. Section "Performance Level Overview" added.
Processor and Architecture	QoS levels can be written/read using 32-bit accesss only.
DSU - Device Service Unit	Register PID1.JEPIDCL reset value 0xF. Editorial updates.
GCLK - Generic Clock Controller	Editorial updates.
RSTC - Reset Controller	Editorial updates.
PM - Power Manager	STDBYCFG.BBIASHS=0x0 turns off Back Biasing in Standby mode. Added Power Reset as option for exiting OFF mode.
OSCCTRL - Oscillators Controller	DFLL48M: Only reference clock drift will make run the compensation out of bounds - voltage and temperature swings are compensated for. USB Clock recovery mode enabled by writing to DFLLCTRL.USBCRM and DFLLCTRL.MODE. STATUS.DFLLRDY indicates readiness of the DFLL48M registers for read/write access. Editorial updates.
OSC32KCTRL - 32.768 kHz Oscillators Controller	XOSC32K.STARTUP times corrected.
SUPC - Supply Controller	Register bit VREF.TSSEL removed.
RTC - Real-Time Counter	16-bit counter: TIMESTAMP.COUT has reset value 0x0000. Frequency correction sign affecting periods, not frequencies. Editorial updates.
DMAC - Direct Memory Access Controller	CHCTRLA.RUNSTDBY supported Editorial updates.
NVMCTRL - Nonvolatile Memory Controller	Editorial updates.
SERCOM - Serial Communication Interface	Editorial updates.
SERCOM USART - SERCOM Synchronous and Asynchronous Receiver and Transmitter	Register RXPL.RXPL: formula corrected. Register CTRLA.TXPO: pin configuration updated.
SERCOM I²C - Inter-Integrated Circuit	Master Operation: Startup timing explained.
TCC - Timer/Counter for Control Applications	Register DRVCTRL.NRVx size corrected.
USB - Universal Serial Bus	Register PCKSIZE.BYTE_COUNT size corrected. Register HSOFC.FLENCE description updated.
CCL - Configurable Custom Logic	Editorial updates.
ADC - Analog-to-Digital Converter	Features: Number of analog inputs updated. Section on Device Temperature Measurement removed: Only one temperature sensor available. Signal Description: Updated signal name from ADC to AIN. AREFA/B naming updated to VREFA/B. Editorial updates.
SLCD - Segment Liquid Crystal Display Controller	Contrast/VLCD values moved to Electrical Characteristics. Frame rate calculation using NB_COM. No Power Mode of LCD Power Supply. Dead Time Insertion removed. Editorial updates.
Electrical Characteristics	LCD parameters expanded.
SAM L22 Errata	New Errata: TRNG: Power consumption in standby mode. Errata reference 14827 EVSYS: Under certain conditions, CHSTATUS.CHBUSYn is cleared too early causing an overrun flag. Errata reference 14835 Device: Some tampering pins may not work in backup mode. Errata reference 15010 Removed Erratum 14815.

Introduction

Updated to 2.46 Coremark/MHz

NVM Software Calibration Area Mapping

Temperature calibration content removed.

Processor and Architecture

Editorial update.

Oscillator Pinout

Recommendation for XOSC32 jitter optimization added.

Power Supply and Start-Up Considerations

VLCD has two alternative functions.
Section "Performance Level Overview" added.

Processor and Architecture

QoS levels can be written/read using 32-bit accesss only.

DSU - Device Service Unit

Register PID1.JEPIDCL reset value 0xF.
Editorial updates.

GCLK - Generic Clock Controller

Editorial updates.

RSTC - Reset Controller

Editorial updates.

PM - Power Manager

STDBYCFG.BBIASHS=0x0 turns off Back Biasing in Standby mode.
Added Power Reset as option for exiting OFF mode.

OSCCTRL - Oscillators Controller

DFLL48M:

Only reference clock drift will make run the compensation out of bounds - voltage and temperature swings are compensated for.
USB Clock recovery mode enabled by writing to DFLLCTRL.USBCRM and DFLLCTRL.MODE.
STATUS.DFLLRDY indicates readiness of the DFLL48M registers for read/write access.
Editorial updates.

OSC32KCTRL - 32.768 kHz Oscillators Controller

XOSC32K.STARTUP times corrected.

SUPC - Supply Controller

Register bit VREF.TSSEL removed.

RTC - Real-Time Counter

16-bit counter: TIMESTAMP.COUT has reset value 0x0000.
Frequency correction sign affecting periods, not frequencies.
Editorial updates.

DMAC - Direct Memory Access Controller

CHCTRLA.RUNSTDBY supported
Editorial updates.

NVMCTRL - Nonvolatile Memory Controller

Editorial updates.

SERCOM - Serial Communication Interface

Editorial updates.

SERCOM USART - SERCOM Synchronous and Asynchronous Receiver and Transmitter

Register RXPL.RXPL: formula corrected.
Register CTRLA.TXPO: pin configuration updated.

SERCOM I²C - Inter-Integrated Circuit

Master Operation: Startup timing explained.

TCC - Timer/Counter for Control Applications

Register DRVCTRL.NRVx size corrected.

USB - Universal Serial Bus

Register PCKSIZE.BYTE_COUNT size corrected.
Register HSOFC.FLENCE description updated.

CCL - Configurable Custom Logic

Editorial updates.

ADC - Analog-to-Digital Converter

Features: Number of analog inputs updated.
Section on Device Temperature Measurement removed: Only one temperature sensor available.
Signal Description:
- Updated signal name from ADC to AIN.
- AREFA/B naming updated to VREFA/B.
Editorial updates.

SLCD - Segment Liquid Crystal Display Controller

Contrast/VLCD values moved to Electrical Characteristics.
Frame rate calculation using NB_COM.
No Power Mode of LCD Power Supply.
Dead Time Insertion removed.
Editorial updates.

Electrical Characteristics

LCD parameters expanded.

SAM L22 Errata

New Errata:

TRNG: Power consumption in standby mode. Errata reference 14827
EVSYS: Under certain conditions, CHSTATUS.CHBUSYn is cleared too early causing an overrun flag. Errata reference 14835
Device: Some tampering pins may not work in backup mode. Errata reference 15010

Removed Erratum 14815.