
106
42073A-MCU Wireless-02/13
ATmega2564/1284/644RFR2
9.9 Continuous Transmission Test Mode
9.9.1 Overview
The 2.4GHz transceiver offers a Continuous Transmission Test Mode to support final
application / production tests as well as certification tests. In 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:
f1 = fCH + 0.5 MHz
f2 = fCH - 0.5 MHz
Here fCH is the channel center frequency programmed by register PHY_CC_CCA.
Note that in CW mode it is not possible to transmit a RF signal directly on the channel
center frequency. PSDU data in the Frame Buffer must contain at least a valid PHR
recommended 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.
9.9.2 Configuration
All register configurations shall be setup as follows before enabling Continuous
Transmission Test Mode:
TX channel setting (optional);
TX output power setting (optional);
Mode selection (PRBS / CW);
An access to the registers TST_CTRL_DIGI and PART_NUM 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 TRX_STATE.
Even for CW signal transmission it is required to write valid PSDU data (see chapter
frame length information. The frame length has to match to the length of the pattern
stored in the frame buffer. For PRBS mode it is recommended to use a frame of
maximum length.
informs about writing (W) or reading (R) a register or the Frame Buffer.
Table 9-30. Continuous Transmission Programming Sequence
Step
Action
Register
R/
W
Value
Description
1
RESET
Reset the transceiver
2
Register Access
IRQ_MASK
W
0x01
Set IRQ mask register, enable
PLL_LOCK interrupt and set
global AVR IRQ enable
3
Register Access
TRX_CTRL_1
W
0x00
Disable TX_AUTO_CRC_ON
4
Register Access
TRX_STATE
W
0x03
Set radio transceiver state
TRX_OFF
5
Register Access
PHY_CC_CCA
W
0x33
Set IEEE 802.15.4 CHANNEL,
e.g. 19