Product Specs

19 CLOCK — Clock control
Page
107
19.3.4 HFCLKSTAT
Address offset: 0x40C
HFCLK status
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
B
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
A
0
Id RW Field
Value Id
Value
Description
A R SRC
RC
0
Source of HFCLK
64 MHz internal oscillator (HFINT)
Xtal
1
64 MHz crystal oscillator (HFXO)
B R STATE
NotRunning
0
HFCLK state
HFCLK not running
Running
1
HFCLK running
19.3.5 LFCLKRUN
Address offset: 0x414
Status indicating that LFCLKSTART task has been triggered
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
A
0
Id RW Field
Value Id
Value
Description
A R STATUS LFCLKSTART task triggered or not
NotTriggered 0 Task not triggered
Triggered 1 Task triggered
19.3.6 LFCLKSTAT
Address offset: 0x418
LFCLK status
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
B
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
A
0
0
A
0
Id RW Field
Value Id
Value
Description
A R SRC
RC
0
Source of LFCLK
32.768 kHz RC oscillator
Xtal
1
32.768 kHz crystal oscillator
Synth
2
32.768 kHz synthesized from HFCLK
B R STATE
NotRunning
0
LFCLK state
LFCLK not running
Running
1
LFCLK running
19.3.7 LFCLKSRCCOPY
Address offset: 0x41C
Copy of LFCLKSRC register, set when LFCLKSTART task was triggered
Bit number
Id
Reset 0x00000000
31 30
0 0
29
0
28
0
27
0
26
0
25
0
24
0
23 22 21 20
0 0 0 0
19
0
18
0
17
0
16
0
15
0
14
0
13
0
12
0
11
0
10
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
A
0
0
A
0
Id RW Field
Value Id
Value
Description
A R SRC
Clock source
RC
0
32.768 kHz RC oscillator
Xtal
1
32.768 kHz crystal oscillator
Synth
2
32.768 kHz synthesized from HFCLK