CC1000-RTR2 datasheet(20/55 Pages) TI

20 / 55 page

CC1000

SWRS048A

Page 20 of 55

Manual Lock

Automatic Lock

Settling

MODEM1.

SETTLING

(1:0)

NRZ mode

MODEM1.LOCK_

AVG_MODE

=’1’

MODEM1.LOCK_

AVG_IN

=’0’=

→’1’**

UART mode

MODEM1.LOCK_

AVG_MODE

=’1’

MODEM1.LOCK_

AVG_IN

=’0’=

→’1’**

NRZ mode

MODEM1.LOCK_

AVG_MODE

=’0’

MODEM1.LOCK_

AVG_IN

=’X’***

UART mode

MODEM1.LOCK_

AVG_MODE

=’0’

MODEM1.LOCK_

AVG_IN

=’X’***

128

Notes:

** The averaging filter is locked when MODEM1.LOCK_AVG_IN is set to 1

*** X = Do not care. The timer for the automatic lock is started when RX mode is set in the RFMAIN

Also please note that in addition to the number of bits required to lock the filter, you need to add the

number of bits needed for the preamble detector. See the next section for more information.

Table 4. Minimum preamble bits for locking the averaging filter, NRZ and UART mode

Settling

MODEM1.

SETTLING

(1:0)

Free-running

Manchester mode

MODEM1.LOCK_

AVG_MODE

=’1’

MODEM1.LOCK_

AVG_IN

=’0’

Table 5. Minimum number preamble chips for averaging filter, Manchester mode

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