AT86RF232 Atmel Corporation, AT86RF232 Datasheet - Page 143

• 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

11.6 Dynamic Frame Buffer Protection
11.6.1 Overview
11.6.2 Register Description
8321A–MCU Wireless–10/11
Bit
0x0C
Read/Write
Reset value
Bit
0x0C
Read/Write
Reset value
The Atmel AT86RF232 continues the reception of incoming frames as long as it is in
any receive state. When a frame was successfully received and stored into the Frame
Buffer, the following frame will overwrite the Frame Buffer content again.
To relax the timing requirements for a Frame Buffer read access the Dynamic Frame
Buffer Protection prevents that a new valid frame passes to the Frame Buffer until a
Frame Buffer read access has ended (indicated by /SEL = H, refer to
A received frame is automatically protected against overwriting:
 in Basic Operating Mode, if its FCS is valid
 in Extended Operating Mode, if an IRQ_3 (TRX_END) is generated
The Dynamic Frame Buffer Protection is enabled with RX_SAFE_MODE set and
applicable transceiver states RX_ON and RX_AACK_ON.
Register 0x0C (TRX_CTRL_2):
The TRX_CTRL_2 register is a multi-purpose control register to control various settings
of the radio transceiver.
Figure 11-17. Register TRX_CTRL_2.
 Bit 7 - RX_SAFE_MODE
Protect Frame Buffer after frame receive with valid FCF check.
Table 11-17. RX_SAFE_MODE.
Register Bits
RX_SAFE_MODE
Note:
This operation mode is independent of the setting of register bits RX_PDT_LEVEL,
(register 0x15, RX_SYN), refer to
Note:
1.
1.
RX_SAFE_MODE
Dynamic Frame Buffer Protection is released with the rising edge of /SEL pin of a
Frame Buffer read access, or radio transceiver state changes from RX_ON or
RX_AACK_ON to another state.
The Dynamic Frame Buffer Protection only prevents write accesses from the air
interface – not from the SPI interface.
R/W
R
7
0
3
0
Value
1
0
(1)
R/W
R
6
0
2
0
Description
Disable Dynamic Frame Buffer protection
Enable Dynamic Frame Buffer protection
Section
reserved
9.1.3.
reserved
R/W
R/W
5
1
1
0
R/W
R
4
0
0
0
AT86RF232
Section
TRX_CTRL_2
TRX_CTRL_2
6.2).
143