CC2430 Datasheet, PDF (143/234 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

CC2430
CLKCON (0xC6) – Clock Control
Bit Name
7 _OSC32K
Reset R/W
1
R/W
6 _OSC
1
R/W
5:3 TICKSPD[2:0] 001
R/W
2:1 _-
0 _CLKSPD
00
R/W
1
R/W
Description
32 kHz clock oscillator select. The 16 MHz high speed RC
oscillator must be selected as system clock source when this bit is
to be changed.
0 – 32 kHz crystal oscillator
1 – 32 kHz RC oscillator
System clock oscillator select:
0 – 32 MHz crystal oscillator
1 – 16 MHz high speed RC oscillator
This setting will only take effect when the selected oscillator is
powered up and stable. If the selected oscillator is not powered up,
then writing this bit will power it up.
Timer ticks output setting, can not be higher than system clock
setting given by OSC bit setting
000 – System clock
001 – System clock / 2
010 – System clock / 4
011 – System clock / 8
100 – System clock / 16
101 – System clock / 32
110 – System clock / 64
111 – System clock / 128
Reserved. Must always be set to 00.
Clock Speed. Sets system clock frequency together with the OSC
bit setting
0 – 32 MHz
1 – 16 MHz
This bit must always follow the value of the OSC bit, which
selects which oscillator to use.
CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A
Page 143 of 232