Datasheet

38
SAM3S [SUMMARY]
6500ES–ATARM–11-Feb-13
10.9 Real Time Timer
z Real Time Timer, allowing backup of time with different accuracies
z 32-bit free-running back-up counter
z Integrates a 16-bit programmable prescaler running on slow clock
z Alarm register capable to generate a wake-up of the system through the Shut Down Controller
10.10 Real Time Clock
z Low power consumption
z Full asynchronous design
z Two hundred year calendar
z Programmable Periodic Interrupt
z Alarm and update parallel load
z Control of alarm and update Time/Calendar Data In
10.11 General Purpose Backup Registers
z Eight 32-bit general-purpose backup registers
10.12 Nested Vectored Interrupt Controller
z Thirty maskable external interrupts
z Sixteen priority levels
z Processor state automatically saved on interrupt entry, and restored on
z Dynamic reprioritization of interrupts
z Priority grouping.
z selection of preempting interrupt levels and non-preempting interrupt levels.
z Support for tail-chaining and late arrival of interrupts.
z back-to-back interrupt processing without the overhead of state saving and restoration between interrupts.
z Processor state automatically saved on interrupt entry, and restored on interrupt exit, with no instruction overhead.
10.13 Chip Identification
z Chip Identifier (CHIPID) registers permit recognition of the device and its revision.
z JTAG ID: 0x05B2D03F
Table 10-1. SAM3S Chip IDs Register
Chip Name
Flash Size
(KBytes) Pin Count DBGU_CIDR CHIPID_EXID
ATSAM3S4A (Rev A) 256 48 0x28800960 0x0
ATSAM3S2A (Rev A) 128 48 0x288A0760 0x0
ATSAM3S1A (Rev A) 64 48 0x28890560 0x0
ATSAM3S4B (Rev A) 256 64 0x28900960 0x0
ATSAM3S2B (Rev A) 128 64 0x289A0760 0x0
ATSAM3S1B (Rev A) 64 64 0x28990560 0x0
ATSAM3S4C (Rev A) 256 100 0x28A00960 0x0
ATSAM3S2C (Rev A) 128 100 0x28AA0760 0x0
ATSAM3S1C (Rev A) 64 100 0x28A90560 0x0