CC2500-RTY1 datasheet(82/99 Pages) TI1

82 / 99 page

CC2500

SWRS040C

Page 82 of 89

0x33 (0xF3): LQI – Demodulator Estimate for Link Quality

Bit

Field Name

Reset

R/W

Description

CRC_OK

The last CRC comparison matched. Cleared when

entering/restarting RX mode. Only valid if

PKTCTRL0.CC2400_EN=1.

6:0

LQI_EST[6:0]

The Link Quality Indicator estimates how easily a received signal

can be demodulated. Calculated over the 64 symbols following

the sync word.

0x34 (0xF4): RSSI – Received Signal Strength Indication

Bit

Field Name

Reset

R/W

Description

7:0

RSSI

Received signal strength indicator

0x35 (0xF5): MARCSTATE – Main Radio Control State Machine State

Bit

Field Name

Reset

R/W

Description

7:5

Reserved

4:0

MARC_STATE[4:0]

Main Radio Control FSM State

Value

State name

State (Figure 15, page 39)

0 (0x00)

SLEEP

1 (0x01)

IDLE

2 (0x02)

XOFF

3 (0x03)

VCOON_MC

MANCAL

4 (0x04)

REGON_MC

MANCAL

5 (0x05)

MANCAL

6 (0x06)

VCOON

FS_WAKEUP

7 (0x07)

REGON

FS_WAKEUP

8 (0x08)

STARTCAL

CALIBRATE

9 (0x09)

BWBOOST

SETTLING

10 (0x0A)

FS_LOCK

SETTLING

11 (0x0B)

IFADCON

SETTLING

12 (0x0C)

ENDCAL

CALIBRATE

13 (0x0D)

14 (0x0E)

RX_END

15 (0x0F)

RX_RST

16 (0x10)

TXRX_SWITCH

TXRX_SETTLING

17 (0x11)

RXFIFO_OVERFLOW

18 (0x12)

FSTXON

19 (0x13)

20 (0x14)

TX_END

21 (0x15)

RXTX_SWITCH

RXTX_SETTLING

22 (0x16)

TXFIFO_UNDERFLOW

Note: it is not possible to read back the SLEEP or XOFF state numbers

because setting CSn low will make the chip enter the IDLE mode from

the SLEEP or XOFF states.

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