User Manual

111

8111A–AVR–05/08

AT86RF231

9.4.4 Register Description

This register controls the use of the voltage regulators and indicates the status of these.

• Bit 7 - AVREG_EXT

If set this register bit disables the internal analog voltage regulator to apply an external regulated

1.8V supply for the analog building blocks.

•Bit 6 - AVDD_OK

This register bit indicates if the internal 1.8V regulated voltage supply AVDD has settled. The bit

is set to logic high, if AVREG_EXT = 1.

• Bit [5:4] - Reserved

• Bit 3 - DVREG_EXT

If set this register bit disables the internal digital voltage regulator to apply an external regulated

1.8V supply for the digital building blocks.

Bit 76 5 4 3 2 1 0

+0x10 AVREG_EXT AVDD_OK Reserved DVREG_EXT DVDD_OK Reserved VREG_CTRL

Read/Write

R/W R R/W R/W R/W R R/W R/W

Reset Value

00 0 0 0 0 0 0

Table 9-5. Regulated Voltage Supply Control for Analog Building Blocks

AVREG_EXT 0

Internal voltage regulator enabled, analog section

1 Internal voltage regulator disabled, use external regulated 1.8V

supply voltage for the analog section

Table 9-6. Regulated Voltage Supply Control for Analog Building Blocks

AVDD_OK 0

Analog voltage regulator disabled or supply voltage not stable

1 Analog supply voltage has settled

Table 9-7. Regulated Voltage Supply Control for Digital Building Blocks

DVREG_EXT 0

Internal voltage regulator enabled, digital section

1 Internal voltage regulator disabled, use external regulated 1.8V

supply voltage for the digital section