Texas Instruments CC253x User Manual

www.ti.com Registers
SW7 (0x61FB) – Secondary Sync Word Byte 3
Bit
Name Reset R/W Description
No.
7:0
SYNC_WORD2[31:24]
0x00 R/W Contains bits 31:24 of the secondary synchronization word
FREQEST (0x6199) – Estimated RF Frequency Offset
Bit
Name Reset R/W Description
No.
7:0
FREQEST[7:0]
0x00 R Signed value. Contains an estimate of the frequency offset between
carrier and the receiver frequency. FOC_MODE controls when this
estimate is updated.
RXCTRL (0x619A) – Receive Section Tuning
Bit
Name Reset R/W Description
No.
7:6 – 00 R0 Reserved
5:4
GBIAS_LNA2_REF[1:0]
10 R/W Adjusts front-end LNA2/mixer PTAT current output (M =
GBIAS_LNA2_REF[1:0] + 3), default: M = 5.
3:2
GBIAS_LNA_REF[1:0]
10 R/W
Adjusts front-end LNA PTAT current output (M = GBIAS_LNA_REF[1:0]
+ 3), default: M = 5.
1:0
MIX_CURRENT[1:0]
01 R/W Control of the receiver mixers output current. The current increases with
increasing setting.
FSCTRL (0x619B) – Frequency Synthesizer Tuning
Bit
Name Reset R/W Description
No.
7:6
PRE_CURRENT [1:0]
01 R/W Prescaler current setting
5:4
LODIV_BUF_CURRENT_TX
01 R/W Adjusts current in mixer and PA buffers (lodiv_buf_current). Used when
[1:0]
lle_tx_active = 1
3:2
LODIV_BUF_CURRENT_RX
01 R/W Adjusts current in mixer and PA buffers (lodiv_buf_current). Used when
[1:0]
lle_tx_active = 0
1:0
LODIV_CURRENT [1:0]
01 R/W Adjusts divider currents, except mixer and PA buffers.
LNAGAIN (0x61A0) – LNA Gain Setting
Bit
Name Reset R/W Description
No.
7 – 0 R0 Reserved, read as 0
6:5
LNA1_CURRENT[1:0]
11 R/W Gain setting LNA1
00: 0-dB gain (reference level)
01: 3-dB gain
10: Reserved
11: 6-dB gain
4:2
LNA2_CURRENT[2:0]
111 R/W Gain setting LNA2
000: 0-dB gain (reference level)
001: 3-dB gain
010: 6-dB gain
011: 9-dB gain
100: 12-dB gain
101: 15-dB gain
110: 18-dB gain
111: 21-dB gain
1:0
LNA3_CURRENT[1:0]
11 R/W Gain setting LNA3
00: 0-dB gain (reference level)
01: 3-dB gain
10: 6-dB gain
11: 9-dB gain
343
SWRU191C–April 2009–Revised January 2012 CC2541 Proprietary Mode Radio
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Texas Instruments CC253x Specifications

General

Brand	Texas Instruments
Model	CC253x
Category	Microcontrollers
Language	English