CC2430 Datasheet, PDF (202/212 Pages) Texas Instruments – A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigBee-TM

15 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: It is recommended that the voltage
regulators are not used to provide power to
external circuits. This is because of limited
power sourcing capability and due to noise
considerations. External circuitry can be
powered if they can be used when internal
power consumption is low and can be set I PD
mode when internal power consumption I high.
15.1 Voltage Regulators Power-on
The analog voltage regulator is disabled by
setting
the
RF
register
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
16 Evaluation Software
Texas Instruments provides users of CC2430
with a software program, SmartRF^® Studio,
which may be used for radio performance and
functionality evaluation. SmartRF^® Studio runs
CC2430
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, is available on 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 10 on
page 27.
has expired. The delayed power-on can also
be observed by polling the RF register bit
RFPWR.ADI_RADIO_PD.
The digital voltage regulator is disabled when
the CC2430 is placed in power modes PM2 or
PM3 (see section 13.1). When the voltage
regulators are disabled, register and RAM
contents will be retained while the unregulated
2.0 to 3.6 power supply is present.
on Microsoft Windows 95/98 and Microsoft
Windows NT/2000/XP. SmartRF^® Studio can
be downloaded from the Texas Instruments
web page: http://www.ti.com/lpw
CC2430 Data Sheet (rev. 2.1) SWRS036F
Page 202 of 211