C2510Fx / CC2511Fx
CLKCON (0xC6) – Clock Control
Bit
Name
Reset
R/W
Description
7
OSC32K
1
R/W
32 kHz clock oscillator select. The HS RCOSC must be selected as system clock
source when this bit is to be changed.
0
1
32.768 kHz crystal oscillator
Low power RC oscillator (32 – 36 kHz for CC2510Fx and 32 kHz for
CC2511Fx)
Note: This bit is not retained in PM2 and PM3. After re-entry to active mode from
one of these power modes this bit will be at the reset value 1.
6
OSC
1
R/W
System clock oscillator select.
0
1
High speed crystal oscillator
HS RC oscillator
This setting will only take effect when the selected oscillator is powered up and
stable. If the high speed crystal oscillator is not powered up, it should be enabled
by setting SLEEP.OSC_PDto 0 prior to selecting it as source. If the HS RCOSC
is to be the source and it is powered down, setting this bit will turn it on.
5:3
TICKSPD[2:0]
001
R/W
Timer ticks output setting. The value of TICKSPDcannot be higher than CLKSPD.
CLKCON.OSC=0
CLKCON.OSC=1
HS XOSC used as clock source
for system clock
Calibrated HS RCOSC used as
clock source for system clock
000
001
010
011
100
101
110
111
fRef
26 MHz*
NA
NA
fRef /2
fRef /4
fRef /8
fRef /16
fRef /32
fRef /64
fRef /128
13 MHz*
fRef /2
fRef /4
fRef /8
fRef /16
fRef /32
fRef /64
fRef /128
13 MHz
6.5 MHz*
6.5 MHz
3.25 MHz*
1.625 MHz*
812.5 kHz*
406.25 kHz*
203.125 kHz*
3.25 MHz
1.625 MHz
812.5 kHz
406.25 kHz
203.125 kHz
fRef = fxosc for CC2510Fx and fRef = fxosc/2 for CC2511Fx
Numbers above are for CC2510Fx with fxosc = 26 MHz
2:0
CLKSPD[2:0]
001
R/W
Clock speed setting. When a new CLKSPDvalue is written, the new setting is
read when the clock has changed.
CLKCON.OSC=0
CLKCON.OSC=1
HS XOSC used as clock source
for system clock
Calibrated HS RCOSC used as
clock source for system clock
000
001
010
011
100
101
110
111
fRef
26 MHz
NA
NA
fRef /2
fRef /4
fRef /8
fRef /16
fRef /32
fRef /64
fRef /128
13 MHz
fRef /2
fRef /4
fRef /8
fRef /16
fRef /32
fRef /64
fRef /128
13 MHz
6.5 MHz
6.5 MHz
3.25 MHz
1.625 MHz
812.5 kHz
406.25 kHz
203.125 kHz
3.25 MHz
1.625 MHz
812.5 kHz
406.25 kHz
203.125 kHz
f
Ref = fxosc for CC2510Fx and fRef = fxosc/2 for CC2511Fx
Numbers above are for CC2510Fx with fxosc = 26 MHz
SWRS055D
Page 80 of 243
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
