Rainbow Electronics AT86RF231 - Manual (Page 111)

111
8111A–AVR–05/08
AT86RF231
9.4.4 Register Description
Register 0x10 (VREG_CTRL):
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 7 6 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 0 0 0 0 0 0 0 0
Table 9-5. Regulated Voltage Supply Control for Analog Building Blocks
Register Bit Value Description
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
Register Bit Value Description
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
Register Bit Value Description
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