ATSAM3U-EK Atmel, ATSAM3U-EK Datasheet - Page 209

Manufacturer Part Number

KIT EVAL FOR AT91SAM3U CORTEX

Manufacturer

Processor To Be Evaluated

Data Bus Width

Interface Type

Operating Supply Voltage

Silicon Manufacturer

Core Architecture

Core Sub-architecture

Silicon Core Number

Silicon Family Name

Kit Contents

Board CD Docs

Rohs Compliant

For Use With/related Products

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Manufacturer

Part Number:

Manufacturer:

Value to load into the VAL register when the counter is enabled and when it reaches 0, see

6430D–ATARM–25-Mar-11

SysTick Reload Value Register

Calculating the RELOAD value

The LOAD register specifies the start value to load into the VAL register. See the register sum-

The RELOAD value can be any value in the range 0x00000001-0x00FFFFFF. A start value of 0

is possible, but has no effect because the SysTick exception request and COUNTFLAG are acti-

vated when counting from 1 to 0.

The RELOAD value is calculated according to its use:

• To generate a multi-shot timer with a period of N processor clock cycles, use a RELOAD

• To deliver a single SysTick interrupt after a delay of N processor clock cycles, use a RELOAD

value of N-1. For example, if the SysTick interrupt is required every 100 clock pulses, set

RELOAD to 99.

of value N. For example, if a SysTick interrupt is required after 400 clock pulses, set RELOAD

Table 13-33 on page 207

for its attributes. The bit assignments are:

SAM3U Series

“Calculating the RELOAD