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| 型號(hào)： | MJ80C31U-36:D |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MICROCONTROLLER |
| 文件頁(yè)數(shù)： | 96/101頁(yè) |
| 文件大?。?/td> | 3398K |
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117
8168C-MCU Wireless-02/10
AT86RF212
Bit 3:0 – BATMON_VTH
The threshold value for the battery monitor is set by register bits BATMON_VTH.
Table 7-26. Battery Monitor Threshold Voltage
Value
BATMON_VTH[3:0]
Voltage [V]
if BATMON_HR = 1
Voltage [V]
if BATMON_HR = 0
0x0
2.550
1.70
0x1
2.625
1.75
0x2
2.700
1.80
0x3
2.775
1.85
0x4
2.850
1.90
0x5
2.925
1.95
0x6
3.000
2.00
0x7
3.075
2.05
0x8
3.150
2.10
0x9
3.225
2.15
0xA
3.300
2.20
0xB
3.375
2.25
0xC
3.450
2.30
0xD
3.525
2.35
0xE
3.600
2.40
0xF
3.675
2.45
7.7 Crystal Oscillator (XOSC) and Clock Output (CLKM)
The main features are:
16 MHz amplitude-controlled crystal oscillator
Fast settling time after leaving SLEEP state
Configurable trimming capacitance array
Configurable clock output (CLKM)
7.7.1 Overview
The crystal oscillator generates the reference frequency for the AT86RF212. All other
internally generated frequencies of the radio transceiver are derived from this
frequency. Therefore, the overall system performance is mainly determined by the
accuracy of crystal reference frequency. The external components of the crystal
oscillator should be selected carefully and the related board layout should be done with
caution (see section 3).
Two operating modes are supported. The recommended mode is the integrated
oscillator setup as described in Figure 7-15. Alternatively, a reference frequency can be
fed to the internal circuitry by using an external clock reference as shown in Figure 7-
16. The XOSC operating modes are configurable by register 0x12 (XOSC_CTRL).
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