AT86RF232 Atmel Corporation, AT86RF232 Datasheet - Page 111

• Manufacturer Part Number: AT86RF232
• Manufacturer: Atmel Corporation

Specifications of AT86RF232

• Max. Operating Frequency: 0 MHz
• Crypto Engine: AES
• Operating Voltage (vcc): 1.8 to 3.6
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 0.25
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -100
• Receive Current Consumption (ma): 11.8
• Transmit Current Consumption (ma): 13.8
• Link Budget (dbm): 103

9.5 Battery Monitor (BATMON)
9.5.1 Overview
9.5.2 Configuration
9.5.3 Data Interpretation
8321A–MCU Wireless–10/11
The main features of the battery monitor are:
 Configurable voltage threshold range: 1.7V to 3.675V
 Generates an interrupt when supply voltage drops below a threshold
The Atmel AT86RF232 battery monitor (BATMON) detects and indicates a low supply
voltage of the external supply voltage at pin 28 (EVDD). This is done by comparing the
voltage on the external supply pin 28 (EVDD) with a configurable internal threshold
voltage. A simplified schematic of the BATMON with the most important input and
output signals is shown in
Figure 9-9. Simplified Schematic of BATMON.
The BATMON can be configured using the register 0x11 (BATMON). Register bits
BATMON_VTH sets the threshold voltage. It is configurable with a resolution of 75mV
in the upper voltage range (BATMON_HR = 1) and with a resolution of 50mV in the
lower voltage range (BATMON_HR = 0), for details refer to register 0x11 (BATMON).
The signal register bit BATMON_OK of register 0x11 (BATMON) monitors the current
value of the battery voltage:
 If BATMON_OK = 0, the battery voltage is lower than the threshold voltage
 If BATMON_OK = 1, the battery voltage is higher than the threshold voltage
After setting a new threshold, the value BATMON_OK should be read out to verify the
current supply voltage value.
BATMON_VTH
Note:
BATMON_HR
4
1.
For input-to-output mapping
The battery monitor is inactive during P_ON, and SLEEP states, see register
bits TRX_STATUS (register 0x01, TRX_STATUS).
see control register
0x11 (BATMON)
DAC
Figure
Threshold
EVDD
Voltage
9-9.
+
-
„1“
BATMON_OK
D
clear
Q
AT86RF232
BATMON_IRQ
111