ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 175

• Manufacturer Part Number: ATmega1284PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega1284PR231

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -101
• Receive Current Consumption (ma): 13.2
• Transmit Current Consumption (ma): 14.4
• Link Budget (dbm): 104

20. Appendix A - Continuous Transmission Test Mode
20.1
20.2
8111C–MCU Wireless–09/09
Overview
Configuration
The AT86RF231 offers a Continuous Transmission Test Mode to support final application / pro-
duction tests as well as certification tests. Using this test mode the radio transceiver transmits
continuously a previously transferred frame (PRBS mode) or a continuous wave signal (CW
mode).
In CW mode two different signal frequencies per channel can be transmitted:
Here f
Note, in CW mode it is not possible to transmit an RF signal directly on the channel center
frequency.
PSDU data in the Frame Buffer must contain at least a valid PHR (see
- IEEE 802.15.4 - 2006 Frame Format” on page
to use a frame of maximum length (127 bytes) and arbitrary PSDU data for the PRBS mode. The
SHR and the PHR are not transmitted. The transmission starts with the PSDU data and is
repeated continuously.
Before enabling Continuous Transmission Test Mode all register configurations shall be done as
follow:
A register access to register 0x36 and 0x1C enables the Continuous Transmission Test Mode.
The transmission is started by enabling the PLL (TRX_CMD = PLL_ON) and writing the
TX_START command to register 0x02.
Even for CW signal transmission it is required to write valid PSDU data to the Frame Buffer. For
PRBS mode it is recommended to write a frame of maximum length.
The detailed programming sequence is shown in
informs about writing (W) or reading (R) a register or the Frame Buffer.
Table 20-1.
Step
• f
• f
• TX channel setting (optional)
• TX output power setting (optional)
• Mode selection (PRBS / CW)
1
2
3
4
5
6
7
1
2
= f
= f
CH
CH
CH
Action
RESET
Register Access
Register Access
Register Access
Register Access
Register Access
Register Access
is the channel center frequency programmed by register 0x08 (PHY_CC_CCA).
+ 0.5 MHz
- 0.5 MHz
Continuous Transmission Programming Sequence.
Register
0X0E
0x04
0x02
0x03
0x08
0x05
R/W
W
W
W
W
W
W
Value
0x01
0x00
0x03
0x01
0x33
0x00
79) followed by PSDU data. It is recommended
Description
Reset AT86RF231
Set IRQ mask register, enable IRQ_0 (PLL_LOCK)
Disable TX_AUTO_CRC_ON
Set radio transceiver state TRX_OFF
Set clock at pin 17 (CLKM)
Set IEEE 802.15.4 CHANNEL, e.g. 19
Set TX output power, e.g. to Pmax
Table 20-1 on page
Section 8.1 “Introduction
175. The column R/W
AT86RF231
175