参数资料
型号: AT86RF401U
厂商: ATMEL CORP
元件分类: 通信及网络
英文描述: Smart RF Wireless Data Microtransmitter
中文描述: SPECIALTY TELECOM CIRCUIT, PDSO20
封装: 4.40 X 6.50 MM, 0.65 MM PITCH, TSSOP-20
文件页数: 30/52页
文件大小: 479K
代理商: AT86RF401U
30
AT86RF401
1424F
RKE
12/03
Transmit Control Register
TX_CNTL
Bit[7:6]
Reserved.
Bit[5]: TXE, Transmitter Enable
This bit, when set, turns on the phase locked loop (PLL) RF frequency synthesizer but
should not be used to modulate the RF carrier or excessive spurious noise may result.
Bit[4]: TXK, Transmitter Key
This bit, when set, turns on the RF power amplifier. It should be used to modulate the
RF carrier manually. This bit should be cleared when the bit timer is configured in trans-
mit mode.
Figure 25.
Modulation Control Logic
Bit[3]
Reserved.
Bit[2]: LOC, PLL Lock
This bit is set when the frequency synthesizer in the transmitter is locked. Typically, the
programmer should test the status of this bit to insure the RF carrier is stable prior to
turning on the RF power amplifier.
Power Attenuation Control Register
PWR_ATTEN
This register is used to select the power attenuation level. The total power attenuation is
the sum of the coarse attenuation and fine attenuation. As an example, to obtain 15 dB
of attenuation, the coarse setting of 12 dB and fine setting of 3 dB would be selected. To
obtain 12 dB coarse attenuation, Bits[5:3] would be set to [010]. To obtain 3 dB of fine
attentuation would require Bits[2:0] to be set to [011].
Note:
Maximum RF output power occurs when Bits[5:0] = [000000].
Bits[7:6]
Reserved
Bit
7
6
5
4
3
2
1
0
$12
TXE
TXK
LOC
Read/Write
R/W
R/W
R/W
R/W
R/W
R
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
Bit Timer
TXK
ON/OFF
POWER
AMP
PLL
RF
IN
RF
OUT
Bit
7
6
5
4
3
2
1
0
$14
PCC2
PCC1
PCC0
PCF2
PCF1
PCF0
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial Value
0
0
0
0
0
0
0
0
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