CC2430-RTR1-F32 datasheet(207/234 Pages) TI

207 / 234 page

CC2430

CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A

Page 207 of 232

Bit

Name

Reset

R/W

Description

7:0

CCA_THR[7:0]

0xE0

R/W

Clear Channel Assessment threshold value, signed number

in 2’s complement for comparison with the RSSI.

The unit is 1 dB, offset is TBD [depends on the absolute

gain of the RX chain, including external components and

should be measured]. The CCA signal goes high when the

received signal is below this value.

The reset value is in the range of -70 dBm.

Table 50: Register RSSIH (0xDF06)

Bit

Name

Reset

R/W

Description

7:0

RSSI_VAL[7:0]

0x00

RSSI estimate on a logarithmic scale, signed numbern 2’s

complement.

Unit is 1 dB, offset is TBD [depends on the absolute gain of

the RX chain, including external components, and should

be measured]. The RSSI value is averaged over 8 symbol

periods.

Table 51: Register RSSIL (0xDF07)

Bit

Name

Reset

R/W

Description

7:0

SYNCWORD[15:8]

0xA7

R/W

Synchronization word. The SYNCWORD is processed from

the least significant nibble (F at reset) to the most significant

nibble (A at reset).

SYNCWORD is used both during modulation (where 0xF’s

are replaced with 0x0’s) and during demodulation (where

0xF’s are not required for frame synchronization). In

reception an implicit zero is required before the first symbol

required by SYNCWORD.

The reset value is compliant with IEEE 802.15.4.

Table 52: Register SYNCWORDH (0xDF08)

Bit

Name

Reset

R/W

Description

7:0

SYNCWORD[7:0]

0x0F

R/W

Synchronization word. The SYNCWORD is processed from

the least significant nibble (F at reset) to the most significant

nibble (A at reset).

SYNCWORD is used both during modulation (where 0xF’s

are replaced with 0x0’s) and during demodulation (where

0xF’s are not required for frame synchronization). In

reception an implicit zero is required before the first symbol

required by SYNCWORD.

The reset value is compliant with IEEE 802.15.4.

Table 53: Register SYNCWORDL (0xDF09)

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