SAMD20G_14 Datasheet, PDF (654/676 Pages) ATMEL Corporation – SMART ARM-Based Microcontroller

Power Manager
z Updated “Overview” on page 107
z “power save modes” is changed to “sleep modes”
z A new line is added: “This is because during STANDBY sleep mode the internal
voltage regulator will be in low power mode”
z Updated “Features” on page 107
z Clock control: “Generates” is changed to “Controls”
z Updated “Clocks” on page 109
z “This clock” is changed to “The clock source for GCLK_MAIN”
z Updated “Interrupts” on page 109
z Added: “Refer to “Nested Vector Interrupt Controller” on page 30 for details”
z Updated “Register Access Protection” on page 109
z Added: “Refer to INTFLAG for details”
z Added: “Refer to RCAUSE for details”
z Updated “Synchronous Clocks” on page 110
z Added: “see Table 15-4”
z Updated “Reset Controller” on page 110
z “resets” corrected to “reset”
z Updated “Sleep Mode Controller” on page 110
z Added: “see Table 15-4”
z Updated “Initialization” on page 110
z Added: “- refer to RCAUSE for details”
z Updated “Selecting the Synchronous Clock Division Ratio” on page 110
z Added: “(APBxSEL.APBxDIV)”
z Updated Figure 15-2
z Updated “Clock Ready Flag” on page 111
z “CKSEL” is changed to “CPUSEL”
z Updated “Peripheral Clock Masking” on page 111
z Added: “- refer to APBAMASK for details”
z The first sentence below the figure has been changed to: “When the APB clock for
a module is not provided its registers cannot be read or written.”
z Updated “Clock Failure Detector” on page 112
z “CFDEN.CTRL” has been changed to “CTRL.CFDEN”
z Added: “Refer to CTRL for detailed information.”
z “divided” has been changed to “undivided”
z “is generated, if enabled” has been changed to "is set and the corresponding
interrupt request will be generated if enabled"
z “GCLKMAIN” has been changed to “GCLK_MAIN”
z Added: Note 3
z Updated Table 15-2
z “GCLK” has been changed to “Generic Clock”
z Updated Figure 15-3
z Updated Table 15-3
z Two notes (“Synchronous” and “Asynchronous”) are added below the table
z Updated “Sleep Mode Controller” on page 114
z Updated the text in STANDBY mode
Atmel | SMART SAM D20 [DATASHEET]
Atmel-42129L–SAM-D20_datasheet–09/2014
654