CC2510_15 Datasheet, PDF (79/245 Pages) Texas Instruments – Low-Power SoC (System-on-Chip) with MCU, Memory,2.4 GHz RF Transceiver, and USB Controller

CC2511F8 - Not Recommended for New Designs
CC2510Fx / CC2511Fx
CLKCON (0xC6) - Clock Control
Bit Field Name
Reset R/W Description
7
OSC32K
1
R/W 32 kHz clock oscillator select. The HS RCOSC must be clock source for the
system clock (CLKCON.OSC=1) 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
If the selected oscillator is not already powered up when this bit is set/cleared, it
will be powered up by selecting it.
This setting will only take effect when the selected oscillator is powered up and
stable and when the calibration of the HS RCOSC and initial calibration of the
low power RC oscillator is completed.
Note: It is not possible to change from high speed RC oscillator to high speed
crystal oscillator when SLEEP.MODE≠00
5:3 TICKSPD[2:0] 001
R/W Timer tick speed 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 fRef
26 MHz
NA
NA
001 fRef /2
13 MHz
fRef /2
13 MHz
010 fRef /4
6.5 MHz
fRef /4
6.5 MHz
011 fRef /8
3.25 MHz
fRef /8
3.25 MHz
100 fRef /16
1.625 MHz
fRef /16
1.625 MHz
101 fRef /32
812.5 kHz
fRef /32
812.5 kHz
110 fRef /64
406.25 kHz
fRef /64
406.25 kHz
111 fRef /128
203.125 kHz
fRef /128
203.125 kHz
fRef = fxosc for CC2510Fx and fRef = fxosc/2 for CC2511Fx
Numbers above are for CC2510Fx with fxosc = 26 MHz
System 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 fRef
26 MHz
NA
001 fRef /2
13 MHz
fRef /2
010 fRef /4
6.5 MHz
fRef /4
011 fRef /8
3.25 MHz
fRef /8
100 fRef /16
1.625 MHz
fRef /16
101 fRef /32
812.5 kHz
fRef /32
110 fRef /64
406.25 kHz
fRef /64
111 fRef /128 203.125 kHz
fRef /128
fRef = fxosc for CC2510Fx and fRef = fxosc/2 for CC2511Fx
Numbers above are for CC2510Fx with fxosc = 26 MHz
NA
13 MHz
6.5 MHz
3.25 MHz
1.625 MHz
812.5 kHz
406.25 kHz
203.125 kHz
SWRS055G
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