AT86RF212 Atmel Corporation, AT86RF212 Datasheet - Page 117

• Manufacturer Part Number: AT86RF212
• Manufacturer: Atmel Corporation

Specifications of AT86RF212

• Max. Operating Frequency: 0 MHz
• Crypto Engine: AES
• Operating Voltage (vcc): 1.8 to 3.6
• Frequency Band: 700/800/900MHz
• Max Data Rate (mb/s): 1
• Antenna Diversity: No
• External Pa Control: Yes
• Power Output (dbm): 10
• Receiver Sensitivity (dbm): -110
• Receive Current Consumption (ma): 9.0
• Transmit Current Consumption (ma): 18 at 5dBm
• Link Budget (dbm): 120

7.7 Crystal Oscillator (XOSC) and Clock Output (CLKM)
7.7.1 Overview
8168C-MCU Wireless-02/10
• 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
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)
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).
BATMON_VTH[3:0]
Value
0xC
0xD
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0xA
0xB
0xE
0xF
if BATMON_HR = 1
Voltage [V]
2.550
2.625
2.700
2.775
2.850
2.925
3.000
3.075
3.150
3.225
3.300
3.375
3.450
3.525
3.600
3.675
if BATMON_HR = 0
AT86RF212
Voltage [V]
1.70
1.75
1.80
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
2.25
2.30
2.35
2.40
2.45
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