CC2400RSUR Datasheet, PDF (61/84 Pages) Texas Instruments – 2.4 GHz Low-Power RF Transceiver

CC2400
AGCCTRL (0x04) - AGC Control and Status
Bit
15:8
Field Name
VGA_GAIN [7:0]
Reset R/W
0XF7 R/W
7:4
-
3
AGC_LOCKED
2
AGC_LOCK
1
AGC_SYNC_LOCK
0
W0
0
R
0
R/W
0
R/W
0
VGA_GAIN_OE
0
R/W
Description
When written, VGA manual gain override value; when read, the
currently used VGA gain setting.
Reserved, write as 0.
AGC lock status
Lock gain after maximum number of attempts.
Lock gain after sync word received and maximum number of
attempts. (As configured in AGCTST0.AGC_ATTEMPTS. Attempts
may be 0)
Use the VGA_GAIN value during RX instead of the AGC value.
FREND (0x05) – Front-end Control Register
Bit
15:4
3
2:0
Field Name
-
-
PA_LEVEL[2:0]
Reset R/W
0
W0
1
W1
7
R/W
Description
Reserved, write as 0.
Reserved, write as 1.
PA output power level.
RSSI (0x06) - RSSI Status and Control Register
Bit
15:8
Field Name
RSSI_VAL[7:0]
7:2
RSSI_CS_THRES[5:0]
1:0
RSSI_FILT[1:0]
Reset R/W
-
R
0X3C R/W
2
R/W
Description
Averaged RSSI estimate on a logarithmic scale in signed two’s
complement format. Unit is 1 dB.
Offset= -54dB, see also page 44.
Carrier sense signal threshold value in signed two’s complement
format. Unit is 4 dB.
The CS_ABOVE_THRESHOLD_N signal goes low when the
received signal is above this value.
The CS_ABOVE_THRESHOLD_N signal is available on the
GIO1 pin or in the status word returned during SPI address byte.
The reset value corresponds to a threshold of approx. -69 dBm.
RSSI averaging filter length:
0: 0 bits (no filtering)
1: 1 bit
2: 4 bits
3: 8 bits
SWRS042A
Page 61 of 83