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22 xosc_ctrl - crystal oscillator control register, Atmega128rfa1 – Rainbow Electronics ATmega128RFA1 User Manual

Page 117

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117


8266A-MCU Wireless-12/09

ATmega128RFA1

Table 9-56 BATMON_HR Register Bits

Register Bits

Value

Description

0

Enables the low range, see BATMON_VTH

BATMON_HR

1

Enables the high range, see BATMON_VTH

Bit 3:0 – BATMON_VTH3:0 - Battery Monitor Threshold Voltage

The threshold values for the battery monitor are set by these register bits according to
the following table.

Table 9-57 BATMON_VTH Register Bits

Register Bits

Value

Description

0x0

2.550V (BATMON_HR=1) 1.70V
(BATMON_HR=0)

0x1

2.625V (BATMON_HR=1) 1.75V
(BATMON_HR=0)

0x2

2.700V (BATMON_HR=1) 1.80V
(BATMON_HR=0)

0x3

2.775V (BATMON_HR=1) 1.85V
(BATMON_HR=0)

0x4

2.850V (BATMON_HR=1) 1.90V
(BATMON_HR=0)

0x5

2.925V (BATMON_HR=1) 1.95V
(BATMON_HR=0)

0x6

3.000V (BATMON_HR=1) 2.00V
(BATMON_HR=0)

0x7

3.075V (BATMON_HR=1) 2.05V
(BATMON_HR=0)

0x8

3.150V (BATMON_HR=1) 2.10V
(BATMON_HR=0)

0x9

3.225V (BATMON_HR=1) 2.15V
(BATMON_HR=0)

0xA

3.300V (BATMON_HR=1) 2.20V
(BATMON_HR=0)

0xB

3.375V (BATMON_HR=1) 2.25V
(BATMON_HR=0)

0xC

3.450V (BATMON_HR=1) 2.30V
(BATMON_HR=0)

0xD

3.525V (BATMON_HR=1) 2.35V
(BATMON_HR=0)

0xE

3.600V (BATMON_HR=1) 2.40V
(BATMON_HR=0)

BATMON_VTH3:0

0xF

3.675V (BATMON_HR=1) 2.45V
(BATMON_HR=0)

9.12.22 XOSC_CTRL – Crystal Oscillator Control Register

Bit

7

6

5

4

NA ($152)

XTAL_MODE3

XTAL_MODE2

XTAL_MODE1

XTAL_MODE0

XOSC_CTRL

Read/Write

RW

RW

RW

RW

Initial Value

1

1

1

1