ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 207

• Manufacturer Part Number: ATSAM3U-EK
• Description: KIT EVAL FOR AT91SAM3U CORTEX
• Manufacturer: Atmel
• Type: MCUr

Specifications of ATSAM3U-EK

• Contents: Board
• Processor To Be Evaluated: SAM3U
• Data Bus Width: 32 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 3 V
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex - M3
• Silicon Core Number: SAM3U4E
• Silicon Family Name: SAM3U
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT91SAM3U
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

13.21 System timer, SysTick
Table 13-33. System timer registers summary
1.
6430D–ATARM–25-Mar-11
Address
0xE000E010
0xE000E014
0xE000E018
0xE000E01C
SysTick calibration value.
Name
CTRL
LOAD
VAL
CALIB
The processor has a 24-bit system timer, SysTick, that counts down from the reload value to
zero, reloads (wraps to) the value in the LOAD register on the next clock edge, then counts
down on subsequent clocks.
When the processor is halted for debugging the counter does not decrement.
The system timer registers are:
Type
RW
RW
RW
RO
Required
privilege
Privileged
Privileged
Privileged
Privileged
Reset
value
0x00000004
0x00000000
0x00000000
0x0002904
(1)
Description
“SysTick Control and Status Register” on page 208
“SysTick Reload Value Register” on page 209
“SysTick Current Value Register” on page 210
“SysTick Calibration Value Register” on page 211
SAM3U Series
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