CC2400-RTR1 datasheet(61/84 Pages) TI1

61 / 84 page

CC2400

SWRS042A

Page 61 of 83

AGCCTRL (0x04) - AGC Control and Status

Bit

Field Name

Reset

R/W

Description

15:8

VGA_GAIN [7:0]

0XF7

R/W

When written, VGA manual gain override value; when read, the

currently used VGA gain setting.

7:4

Reserved, write as 0.

AGC_LOCKED

AGC lock status

AGC_LOCK

R/W

Lock gain after maximum number of attempts.

AGC_SYNC_LOCK

R/W

Lock gain after sync word received and maximum number of

attempts. (As configured in AGCTST0.AGC_ATTEMPTS. Attempts

may be 0)

VGA_GAIN_OE

R/W

Use the VGA_GAIN value during RX instead of the AGC value.

FREND (0x05) – Front-end Control Register

Bit

Field Name

Reset

R/W

Description

15:4

Reserved, write as 0.

Reserved, write as 1.

2:0

PA_LEVEL[2:0]

R/W

PA output power level.

RSSI (0x06) - RSSI Status and Control Register

Bit

Field Name

Reset

R/W

Description

15:8

RSSI_VAL[7:0]

Averaged RSSI estimate on a logarithmic scale in signed two’s

complement format. Unit is 1 dB.

Offset= -54dB, see also page 44.

7:2

RSSI_CS_THRES[5:0]

0X3C

R/W

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.

1:0

RSSI_FILT[1:0]

R/W

RSSI averaging filter length:

0: 0 bits (no filtering)

1: 1 bit

2: 4 bits

3: 8 bits

CC2400-RTR1 Datasheet(PDF) 61 Page - Texas Instruments

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