FX980 datasheet(53/86 Pages) CMLMICRO

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TETRA Baseband Processor

FX980

D/980/3

TxRampUpInc

Title:

Transmit Ramp Up Increment registers.

Address:

$0x4C to $0x4D (mapped over 2 locations)

Function:

Description:

The value in this register sets the scale of the Tx amplitude gain increments which occur over

each sample clock period, thus determining the Tx amplitude ramp up time period. The value is

always positive. The ramp up rate, in terms of the number of symbols, is given by the formula:

symbols

inc

Where:

symbols

is the ramp time in terms of number

of symbols.

Ninc

is the value in the register.

Bit

Name

Active State

Function

Address $0x4C

7:0

RampUpIncLSB

Data RW

Least significant 8 bits of the ramp up increment register.

Address $0x4D

7:1

Reserved. Set these bits Low. Undefined on read.

RampUpIncMSB

Data RW

Most significant bit of the ramp up increment register.

• Address and Data format for TxRampUpInc access

D1 D0

D7 D6 D5 D4 D3 D2

Data field [8:0]

Address field

[6:0]

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