CC1000-RTR2 datasheet(41/55 Pages) TI

41 / 55 page

CC1000

SWRS048A

Page 41 of 55

CURRENT Register (09h)

NAME

Default

value

Active

Description

CURRENT[7:4]

VCO_CURRENT[3:0]

1100

Control of current in VCO core for TX and RX

0000 : 150

µA

0001 : 250

µA

0010 : 350

µA

0011 : 450

µA

0100 : 950

µA, use for RX, f= 400 – 500 MHz

0101 : 1050

µA

0110 : 1150

µA

0111 : 1250

µA

1000 : 1450

µA, use for RX, f<400 MHz and f>500

MHz; and TX, f= 400 – 500 MHz

1001 : 1550

µA, use for TX, f<400 MHz

1010 : 1650

µA

1011 : 1750

µA

1100 : 2250

µA

1101 : 2350

µA

1110 : 2450

µA

1111 : 2550

µA, use for TX, f>500 MHz

CURRENT[3:2]

LO_DRIVE[1:0]

Control of current in VCO buffer for LO drive

00 : 0.5mA, use for TX

01 : 1.0mA , use for RX, f<500 MHz*

10 : 1.5mA,

11 : 2.0mA, use for RX, f>500 MHz *

* LO_DRIVE can be reduced to save current in

RX mode. See

Table 10 for details

CURRENT[1:0]

PA_DRIVE[1:0]

Control of current in VCO buffer for PA

00 : 1mA, use for RX

01 : 2mA, use for TX, f<500 MHz

10 : 3mA

11 : 4mA, use for TX, f>500 MHz

FRONT_END Register (0Ah)

NAME

Default

value

Active

Description

FRONT_END[7:6]

Not used

FRONT_END[5]

BUF_CURRENT

Control of current in the LNA_FOLLOWER

0 : 520uA, use for f<500 MHz

1 : 690uA, use for f>500 MHz *

*BUF_CURRENT can be reduced to save

current in RX mode. See

Table 10 for details.

FRONT_END[4:3]

LNA_CURRENT

[1:0]

Control of current in LNA

00 : 0.8mA, use for f<500 MHz *

01 : 1.4mA

10 : 1.8mA, use for f>500 MHz *

11 : 2.2mA

*LNA_CURRENT can be reduced to save

current in RX mode. See

Table 10 for details.

FRONT_END[2:1]

IF_RSSI[1:0]

Control of IF_RSSI pin

00 : Internal IF and demodulator, RSSI inactive

01 : RSSI active, RSSI/IF is analog RSSI output

10 : External IF and demodulator, RSSI/IF is

mixer output. Internal IF in power down mode.

11 : Not used

FRONT_END[0]

XOSC_BYPASS

0 : Internal XOSC enabled

1 : Power-Down of XOSC, external CLK used

CC1000-RTR2 Datasheet(PDF) 41 Page - Texas Instruments

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