Registers
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RFST (0xE1) – LLE and FIFO commands
Bit
Name Reset R/W Description
No.
7:0
RFST[7:0]
0x00 R/WH0 Commands to radio are written to this register. The register is cleared (set
to 0x00) when the radio is ready for a new command.
25.12.3.1 XREG Register Descriptions
FRMCTRL0 (0x6180) – Frame Control
Bit
Name Reset R/W Description
No.
7:5
FOC_MAGN_CONT[2:0]
000 R/W Controls how signal amplitude is weighted into the frequency offset
compensation scheme.
000: Magnitude has no effect
001 to 111: Low-to-high weighting of the magnitude
4:2 – 000 R/W Reserved always write 0.
1
SW_CRC_MODE
0 R/W 0: The sync word is not included in the crc calculation.
1: The sync word is included in the crc calculation. Only to be used with
whitening disabled.
0
ENDIANNESS
0 R/W 0: The data goes LSB-first over the air.
1: The data goes MSB-first over the air.
RFIRQM0 (0x6181) – RF Interrupt Masks
Bit
Name Reset R/W Description
No.
7:4 – 0000 R0 Reserved
3
RXTHSHUP
0 R/W Rx FIFO goes above its upper threshold.
0: Interrupt disabled
1: Interrupt enabled
2
TXTHSHUP
0 R/W Tx FIFO goes above its upper threshold.
0: Interrupt disabled
1: Interrupt enabled
1
RXTHSHDN
0 R/W Rx FIFO goes below its lower threshold.
0: Interrupt disabled
1: Interrupt enabled
0
TXTHSHDN
0 R/W Tx FIFO goes below its lower threshold.
0: Interrupt disabled
1: Interrupt enabled
336
CC2541 Proprietary Mode Radio SWRU191C– April 2009–Revised January 2012
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