Datasheet
1479
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
12-Jun-2014
Section 12.10.1.4 “SysTick Calibration Value Register”: updated register reset value; updated ‘TENMS’ and
‘SKEW’ field descriptions
Section 12.12.2.1 “Coprocessor Access Control Register”: replaced ‘CPn’ field description with ‘CP10 and
CP11’ field descriptions
Section 12.12.2.3 “Floating-point Context Address Register”: updated ‘ADDRESS’ field description
Section 12.12.2.5 “Floating-point Default Status Control Register”: updated descriptions of fields ‘AHP’, ‘DN’,
‘FZ’, and ‘RMode’
Replaced “£” with “≤” in operation description in equations (Section 12.6.7.1 “SSAT and USAT”)
Updated Section 12.8.2.1 “NVIC Programming Hints”
Updated Section 13.6.3 “ERASE Pin”.
Modified Section 13.6.5 “Serial Wire JTAG Debug Port (SWJ-DP) Pins” (added references to PA7)
Section 14. “Reset Controller (RSTC)”
Minor editorial and formatting changes throughout
Section 14.4.2.2 “NRST External Reset Control” replaced “ext_nreset” with “exter_nreset”
Section 14.4.4.1 “General Reset”: replaced “A general reset occurs when a Power-on-reset is detected” with “A
general reset occurs when a VDDIO Power-on-reset is detected”
Updated Figure 14-3 “General Reset State”
Section 14.4.4.2 “Backup Reset”: replaced “core_backup_reset” with “vddcore_nreset”; reworded content to
improve comprehension
Section 14.5.1 “Reset Controller Control Register” updated EXTRST value 1 description
Updated Section 14.5.2 “Reset Controller Status Register”
Updated Section 14.5.3 “Reset Controller Mode Register”
Modified Section 14.2 “Embedded Characteristics” and Section 14.4.4.4 “Software Reset”
Section 15. “Real-time Timer (RTT)”
General editorial and formatting changes throughout
Figure 15-1, “Real-time Timer” replaced “16-bit Divider” with “16-bit Prescaler
Revised Section 15.4 “Functional Description”
Section 15.5.1 “Real-time Timer Mode Register”: updated RTPRES field description
Section 15.5.4 “Real-time Timer Status Register”: updated RTTINC bit description
Updated Section 15.4 “Functional Description”.
Modified ALMV description in Section 15.5.2 “Real-time Timer Alarm Register”.
Updated Figure 15-2 “RTT Counting”
Section 16. “Real-time Clock (RTC)”
Section 16.1 “Description””: updated to explain need for accurate external 32.768 kHz clock Harmonized write
protection register naming throughout
Updated Section 16.2 “Embedded Characteristics”
Section 16.5.6 “Updating Time/Calendar””: reworded second paragraph for clarity
Section 16.5.7 “RTC Accurate Clock Calibration”: replaced sentence “The period interval between 2 correction
events is programmable in order to cover the possible crystal oscillator clock variations” with “According to the
CORRECTION, NEGPPM and HIGHPPM values configured in the RTC Mode Register (RTC_MR), the period
interval between two correction events differs”
Updated
Section 16.6.2 “RTC Mode Register”
Modified Section 16.6.1 “RTC Control Register”, Section 16.6.5 “RTC Time Alarm Register” and Section 16.6.6
“RTC Calendar Alarm Register” : added sentence “This register can only be written if the WPEN bit is cleared in
the System Controller Write Protection Mode Register (SYSC_WPMR)”
Table 52-1. SAM4E Datasheet Rev. 11157D 12-Jun-14 Revision history (Continued)
Doc. Date Changes