Rainbow Electronics ATmega128RFA1 - Manual (Page 115)

115
8266A-MCU Wireless-12/09
ATmega128RFA1
• Bit 6 – TX_END - TX_END Interrupt Status
• Bit 5 – AMI - Address Match Interrupt Status
• Bit 4 – CCA_ED_DONE - End of ED Measurement Interrupt Status
• Bit 3 – RX_END - RX_END Interrupt Status
• Bit 2 – RX_START - RX_START Interrupt Status
• Bit 1 – PLL_UNLOCK - PLL Unlock Interrupt Status
• Bit 0 – PLL_LOCK - PLL Lock Interrupt Status
9.12.20 VREG_CTRL – Voltage Regulator Control and Status Register
Bit 7 6 5 4
NA ($150) AVREG_EXT AVDD_OK Resx5 Resx4 VREG_CTRL
Read/Write RW R RW RW
Initial Value 0 0 0 0
Bit 3 2 1 0
NA ($150) Resx3 DVDD_OK Resx1 Resx0 VREG_CTRL
Read/Write RW R RW RW
Initial Value 0 0 0 0
This register controls the use of the voltage regulators and indicates their status.
• Bit 7 – AVREG_EXT - Use External AVDD Regulator
If set, this register bit disables the internal analog voltage regulator to apply an external
regulated 1.8V supply for the analog building blocks.
Table 9-51 AVREG_EXT Register Bits
Register Bits Value Description
0 Internal AVDD voltage regulator for the
analog section is enabled. AVREG_EXT
1 Internal AVDD voltage regulator is disabled;
use external regulated 1.8V supply voltage
for the analog section.
• Bit 6 – AVDD_OK - AVDD Supply Voltage Valid
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.
Table 9-52 AVDD_OK Register Bits
Register Bits Value Description
0 Analog voltage regulator disabled or supply
voltage not stable AVDD_OK
1 Analog supply voltage has settled
• Bit 5:3 – Resx5:3 - Reserved
• Bit 2 – DVDD_OK - DVDD Supply Voltage Valid
This register bit indicates if the internal 1.8V regulated voltage supply DVDD has
settled. The bit is set to logic high if DVREG_EXT = 1.