CC2430-RTR1-F64Z datasheet(223/234 Pages) TI

223 / 234 page

CC2430

CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A

Page 223 of 232

16 Voltage Regulators

The

CC2430 includes two low drop-out

voltage regulators. These are used to

provide a 1.8 V power supply to the

CC2430 analog and digital power supplies.

Note: The voltage regulators should not be

used to provide power to external circuits

because

limited

power

sourcing

capability

and

also

due

noise

considerations.

The analog voltage regulator input pin

AVDD_RREG is to be connected to the

unregulated 2.0 to 3.6 V power supply.

The regulated 1.8 V voltage output to the

analog

parts,

available

the

RREG_OUT pin. The digital regulator input

pin AVDD_DREG is also to be connected to

the unregulated 2.0 to 3.6 V power supply.

The output of the digital regulator is

connected internally within the

CC2430 to

the digital power supply.

The voltage regulators require external

components as described in section 11 on

page 29.

16.1 Voltage Regulators Power-on

The analog voltage regulator is disabled

setting

the

bit

RFPWR.RREG_RADIO_PD to 1. When the

analog voltage regulator is powered-on by

clearing the RFPWR.RREG_RADIO_PD bit,

there will be a delay before the regulator is

enabled. This delay is programmable

through the RFPWR RF register. The

interrupt flag RFIF.IRQ_RREG_PD is set

when the delay has expired. The delayed

power-on can also be observed by polling

the

bit

RFPWR.ADI_RADIO_PD.

The digital voltage regulator is disabled

when the

CC2430 is placed in power

modes PM2 or PM3 (see section 13.10).

When the voltage regulators are disabled,

while the unregulated 2.0 to 3.6 power

supply is present.

17 Evaluation Software

Chipcon provides users of

CC2430 with a

software

program,

SmartRF

Studio,

which may be used for radio performance

and functionality evaluation. SmartRF

Studio runs on Microsoft Windows 95/98

and

Microsoft

Windows

NT/XP/2000.

SmartRF

® Studio can be downloaded from

Chipcon’s

web

page:

http://www.chipcon.com

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