CC2510FX Datasheet, PDF (80/244 Pages) List of Unclassifed Manufacturers – True System-on-Chip with Low Power RF Transceiver and 8051 MCU

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
32.768 kHz crystal oscillator
1
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
High speed crystal oscillator
1
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_PD to 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 TICKSPD cannot be higher than CLKSPD.
CLKCON.OSC=0
HS XOSC used as clock source
for system clock
CLKCON.OSC=1
Calibrated HS RCOSC used as
clock source for system clock
2:0 CLKSPD[2:0] 001
R/W
000 f_Ref
26 MHz*
NA
NA
001 f_Ref /2
13 MHz*
f_Ref /2
13 MHz
010 f_Ref /4
6.5 MHz*
f_Ref /4
6.5 MHz
011 f_Ref /8
3.25 MHz*
f_Ref /8
3.25 MHz
100 f_Ref /16
1.625 MHz*
f_Ref /16
1.625 MHz
101 f_Ref /32
812.5 kHz*
f_Ref /32
812.5 kHz
110 f_Ref /64
406.25 kHz*
f_Ref /64
406.25 kHz
111 f_Ref /128
203.125 kHz*
f_Ref /128
203.125 kHz
f_Ref = f_xosc for CC2510Fx and f_Ref = f_xosc/2 for CC2511Fx
Numbers above are for CC2510Fx with f_xosc = 26 MHz
Clock speed setting. When a new CLKSPD value is written, the new setting is
read when the clock has changed.
CLKCON.OSC=0
HS XOSC used as clock source
for system clock
CLKCON.OSC=1
Calibrated HS RCOSC used as
clock source for system clock
000 f_Ref
26 MHz
NA
001 f_Ref /2
13 MHz
f_Ref /2
010 f_Ref /4
6.5 MHz
f_Ref /4
011 f_Ref /8
3.25 MHz
f_Ref /8
100 f_Ref /16
1.625 MHz
f_Ref /16
101 f_Ref /32
812.5 kHz
f_Ref /32
110 f_Ref /64
406.25 kHz
f_Ref /64
111 f_Ref /128 203.125 kHz
f_Ref /128
f_Ref = f_xosc for CC2510Fx and f_Ref = f_xosc/2 for CC2511Fx
Numbers above are for CC2510Fx with f_xosc = 26 MHz
NA
13 MHz
6.5 MHz
3.25 MHz
1.625 MHz
812.5 kHz
406.25 kHz
203.125 kHz
SWRS055D
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