CC113LRGPR datasheet(57/86 Pages) TI1

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DRATE _ E

DATA

XOSC

(256 DRATE _ M) 2

XOSC

channel

CHANBW _ E

8 (4

CHANBW _ M) 2

CC113L

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SWRS108B – MAY 2011 – REVISED JUNE 2014

Table 5-36. 0x10: MDMCFG4 - Modem Configuration

Bit

Field Name

Reset

R/W

Description

7:6

CHANBW_E[1:0]

2 (10)

R/W

Sets the decimation ratio for the delta-sigma ADC input

stream and thus the channel bandwidth.

5:4

CHANBW_M[1:0]

0 (00)

R/W

The default values give 203 kHz channel filter bandwidth,

assuming a 26.0 MHz crystal.

3:0

DRATE_E[3:0]

12 (1100)

R/W

The exponent of the user specified symbol rate

Table 5-37. 0x11: MDMCFG3 - Modem Configuration

Bit

Field Name

Reset

R/W

Description

The mantissa of the user specified symbol rate. The symbol

rate is configured using an unsigned, floating-point number

with 9-bit mantissa and 4-bit exponent. The 9th bit is a

hidden ‘1’. The resulting data rate is:

7:0

DRATE_M[7:0]

34 (0x22)

R/W

The default values give a data rate of 115.051 kBaud

(closest setting to 115.2 kBaud), assuming a 26.0 MHz

crystal.

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