AT86RF230_09 ATMEL [ATMEL Corporation], AT86RF230_09 Datasheet - Page 63

• Manufacturer Part Number: AT86RF230_09
• Description: Low Power 2.4 GHz Transceiver for ZigBee, IEEE 802.15.4, 6LoWPAN, RF4CE and ISM
• Manufacturer: ATMEL [ATMEL Corporation]

9.4.2 Configure the Voltage Regulators
9.4.3 Data Interpretation
9.4.4 Register Description
5131E-MCU Wireless-02/09
Bit
0x10
Read/Write
Initial value
Bit
0x10
Read/Write
Initial value
The voltage regulators can be configured by the register 0x10 (VREG_CTRL).
It is recommended to use the internal regulators, but it is also possible to supply the low
voltage domains by an external voltage source. For this configuration, the internal
regulators need to be switched off by setting the register bits to the values
AVREG_EXT = 1 and DVREG_EXT = 1. A regulated external supply voltage of 1.8V
needs to be connected to the pins DVDD and AVDD. When turning on the external
supply, ensure a sufficiently long stabilization time before interacting with the
AT86RF230.
The status bit values AVDD_OK = 1 and DVDD_OK = 1 indicate an enabled and stable
internal supply voltage. Reading 0 indicates a disabled or unstable internal supply
voltage.
Register 0x10 (VREG_CTRL)
This register VREG_CTRL controls the use of the voltage regulators and indicates the
status of these.
• Bit 7 – AVREG_EXT
The register bit AVREG_EXT defines whether the internal analog voltage regulator or
an external regulator is used to supply the analog low voltage building blocks of the
radio transceiver.
Table 9-2. Regulated Voltage Supply Control for Analog Building Blocks
• Bit 6 – AVDD_OK
This register bit AVDD_OK indicates if the internal 1.8V regulated supply voltage AVDD
has settled. The bit is set to logic high, if AVREG_EXT = 1.
Table 9-3 Regulated Voltage Supply Control for Analog Building Blocks
Register Bit
AVREG_EXT
Register Bit
AVDD_OK
AVREG_EXT
DVREG_EXT
R/W
R/W
7
0
3
0
Value
Value
0
1
0
1
AVDD_OK
DVDD_OK
R
R
6
0
2
0
Description
Use internal voltage regulator
Use external voltage regulator, internal voltage
regulator is disabled
Description
Analog voltage regulator disabled or supply voltage not
stable
Analog supply voltage has settled
R/W
R/W
5
0
1
0
Reserved
Reserved
R/W
R/W
AT86RF230
4
0
0
0
VREG_CTRL
VREG_CTRL
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