SAM3X8E Atmel Corporation, SAM3X8E Datasheet - Page 192
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SAM3X8E
Manufacturer Part Number
SAM3X8E
Description
Manufacturer
Atmel Corporation
- Current page: 192 of 1465
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11.22.2
• RELOAD
Value to load into the VAL register when the counter is enabled and when it reaches 0, see
value”
11.22.2.1
192
192
31
23
15
.
7
SAM3X/A
SAM3X/A
SysTick Reload Value Register
Calculating the RELOAD value
30
22
14
6
The LOAD register specifies the start value to load into the VAL register. See the register sum-
mary in
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
to 400.
Table 11-33 on page 190
29
21
13
5
28
20
12
4
-RELOAD
Reserved
RELOAD
RELOAD
for its attributes. The bit assignments are:
27
19
11
3
26
18
10
2
“Calculating the RELOAD
25
17
9
1
11057A–ATARM–17-Feb-12
11057A–ATARM–17-Feb-12
24
16
8
0
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