Registers
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RFIRQM0 (0x61A3) – RF Interrupt Masks
Bit Name Reset R/W Description
No.
7:0
RFIRQM[7:0]
0x00 R/W Bit mask masking out interrupt sources
Bit position
7: RXMASKZERO
6: RXPKTDONE
5: FRAME_ACCEPTED
4: SRC_MATCH_FOUND
3: SRC_MATCH_DONE
2: FIFOP
1: SFD
0: ACT_UNUSED
RFIRQM1 (0x61A4) – RF Interrupt Masks
Bit Name Reset R/W Description
No.
7:0
RFIRQM[14:8]
0x00 R/W Bit mask masking out interrupt sources
Bit position
7: Reserved
6: Reserved
5: CSP_WAIT
4: CSP_STOP
3: CSP_MANINT
2: RF_IDLE
1: TXDONE
0: TXACKDONE
RFERRM (0x61A5) – RF Error Interrupt Mask
Bit Name Reset R/W Description
No.
7:0
RFERRM[7:0]
0x00 R/W Bit mask masking out interrupt sources
Bit position
7: Reserved
6: STROBE_ERR
5: TXUNDERF
4: TXOVERF
3: RXUNDERF
2: RXOVERF
1: RXABO
0: NLOCK
FREQCTRL (0x618F) – Controls the RF Frequency
Bit Name Reset R/W Description
No.
7 – 0 R0 Read as zero
6:0
FREQ[6:0]
0x0B R/W Frequency control word
(2405 MHz)
ƒ
RF
= ƒ
LO
= (2394 + FREQ[6:0]) MHz
The frequency word in FREQ[6:0] is an offset value from 2394. The device
supports the frequency range from 2394 MHz to 2507 MHz. The usable settings
for FREQ[6:0] are consequently 0 to 113. Settings outside this range (114–127)
give a frequency of 2507 MHz.
IEEE 802.15.4-2006 specifies a frequency range from 2405 MHz to 2480 MHz
with 16 channels 5 MHz apart. The channels are numbered 11 through 26. For an
IEEE 802.15.4-2006 compliant system, the only valid settings are thus
FREQ[6:0] = 11 + 5 (channel number – 11).
272
CC253x Radio SWRU191C–April 2009–Revised January 2012
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