SAM4L Datasheet, PDF (238/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

13.7.21 High Resolution Prescaler Control Register
Name:
Access Type:
Reset Value:
HRPCR
Read/Write
0x00000000
ATSAM4L4/L2
31
30
29
28
27
26
25
24
HRCOUNT[23:16]
23
22
21
20
19
18
17
16
HRCOUNT[15:8]
15
14
13
12
11
10
9
8
HRCOUNT[7:0]
7
6
5
4
3
2
1
0
-
-
-
-
CKSEL
HRPEN
• HRCOUNT: High Resolution Counter
Specify the input clock period to count to generate the output clock edge.
HRCOUNT can be written to dynamically in order to tune the HRPCLK frequency on-the-go.
• CKSEL: Clock input selection
This field selects the Clock input for the prescaler. See the “HRP clock sources” table in the SCIF Module Configuration section
for details. It must not be changed if the HRPEN is one.
• HRPEN: High Resolution Prescaler Enable
0: The High Resolution Prescaler is disabled.
1: The High Resolution Prescaler is enabled.
42023C–SAM–02/2013
238