Rainbow-electronics ATmega128RFA1 Manual de usuario Pagina 116

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116
8266A-MCU Wireless-12/09
ATmega128RFA1
Table 9-53 DVDD_OK Register Bits
Register Bits Value Description
0 Digital voltage regulator disabled or supply
voltage not stable
DVDD_OK
1 Digital supply voltage has settled
Bit 1:0 – DVREG_TRIM1:0 - Reserved
Table 9-54 DVREG_TRIM Register Bits
Register Bits Value Description
0 1.80V
1 1.75V
2 1.84V
DVREG_TRIM1:0
3 1.88V
9.12.21 BATMON – Battery Monitor Control and Status Register
Bit 7 6 5 4
NA ($151) BAT_LOW BAT_LOW_EN BATMON_OK BATMON_HR BATMON
Read/Write RW RW R RW
Initial Value 0 0 0 0
Bit 3 2 1 0
NA ($151) BATMON_VTH3 BATMON_VTH2 BATMON_VTH1 BATMON_VTH0
BATMON
Read/Write RW RW RW RW
Initial Value 0 0 1 0
This register configures the battery monitor to observe the supply voltage at EVDD. The
status of the EVDD supply voltage is accessible by reading bit BATMON_OK with
respect to the actual BATMON settings. Furthermore the Battery Monitor Interrupt can
be controlled with the bits BAT_LOW and BAT_LOW_EN similar to the function of the
IRQ_STATUS and IRQ_MASK register for other radio transceiver interrupts.
Bit 7 – BAT_LOW - Battery Monitor Interrupt Status
A BATMON Interrupt is pending if this bit is set. Writing one to this bit if it has been at
one will clear the interrupt.
Bit 6 – BAT_LOW_EN - Battery Monitor Interrupt Enable
The Battery Monitor Interrupt is enabled if this bit is set to one. The Battery Monitor will
not generate an interrupt if this bit is zero.
Bit 5 – BATMON_OK - Battery Monitor Status
The register bit BATMON_OK indicates the level of the external supply voltage with
respect to the programmed threshold BATMON_VTH.
Table 9-55 BATMON_OK Register Bits
Register Bits Value Description
0 The battery voltage is below the threshold. BATMON_OK
1 The battery voltage is above the threshold.
Bit 4 – BATMON_HR - Battery Monitor Voltage Range
This bit sets the range and resolution of the battery monitor.
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