参数资料
型号: MRF89XA-I/MQ
厂商: Microchip Technology
文件页数: 60/140页
文件大小: 0K
描述: TXRX ISM SUB-GHZ ULP 32QFN
标准包装: 73
系列: *
频率: 863MHz ~ 870MHz,902MHz ~ 928MHz,950MHz ~ 960MHz
数据传输率 - 最大: 200kbps
调制或协议: FSK,OOK
应用: ISM
功率 - 输出: 12.5dBm
灵敏度: -113dBm
电源电压: 2.1 V ~ 3.6 V
电流 - 接收: 3mA
电流 - 传输: 25mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
工作温度: -40°C ~ 85°C
封装/外壳: 32-WFQFN 裸露焊盘
包装: 托盘
MRF89XA
3.3.6
POWER AMPLIFIER
3.3.7
TRANSMIT MODE REGISTERS
3.3.6.1 Rise and Fall Time Control
In OOK mode, the PA ramp times can be accurately
controlled through the PARC<1:0> bits
(PACONREG<4:3>). These bits directly control the slew
The registers associated with Transmit mode are:
? GCONREG ( Register 2-1 )
? DMODREG ( Register 2-2 )
? FDEVREG ( Register 2-3 )
rate of the PARS pin.
?
?
BRSREG ( Register 2-4 )
R1CREG ( Register 2-7 )
TABLE 3-2:
POWER AMPLIFIER RISE/
FALL TIMES
?
?
P1CREG ( Register 2-8 )
S1CREG ( Register 2-9 )
PARC<1:0>
00
01
10
11
t PARS
3 μs
8.5 μs
15 μs
23 μs
t PAOUT
(rise / fall)
2.5 / 2 μs
5 / 3 μs
10 / 6 μs
20 / 10 μs
?
?
?
?
?
?
R2CREG ( Register 2-10 )
P2CREG ( Register 2-11 )
S2CREG ( Register 2-12 )
PACREG ( Register 2-13 )
FTXRXIREG ( Register 2-14 )
FTPRIREG ( Register 2-15 )
During the Transmit mode of MRF89XA, the Shift reg-
ister takes bytes from the FIFO and outputs them seri-
ally (MSb first) at the programmed bit rate to the
modulator. When the transmitter is enabled, it starts
sending out data from the Shift register with respect to
the set bit rate. After power-up and with the Transmit
registers enabled, the transmitter preloads the FIFO
with preambles before sending the actual data based
on the mode of operation. Figure 3-4 illustrates the PA
Control Timing.
FIGURE 3-4:
PA TIMING CONTROL
DATA
PARS
[V]
PA Output
Power
95%
60 dB
t PARS
t PA_OUT
95%
t PARS
60 dB
t PA_OUT
DS70622C-page 60
Preliminary
? 2010–2011 Microchip Technology Inc.
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