參數(shù)資料
型號(hào)： M64886FP
廠商： Renesas Technology Corp.
英文描述： RF Transceiver for Short-range Wireless
中文描述： 射頻收發(fā)器的短距離無(wú)線
文件頁(yè)數(shù)： 2/28頁(yè)
文件大小： 445K
代理商： M64886FP
M64886FP
Rev.1.0, Sep.22.2003, page 10 of 27
Notes: 7. DI and DJ are used to turn on / off the Doublers to the TX (DI) and RX (DJ) systems .
DI / DJ
Description
L
Doubler on .
H
Doubler off . (Doubler through)
Notes 8. DK are used to turn on / off the Local Amp to the RX systems .
DK
Description
L
Local Amp on .
H2mA
Notes 9. RA and RB are used to set the current of TX (RA) and RX (RB) charge pump .
RB / RA
Output current value of charge pump
L
400A
H2mA
Notes: 10. Current supplied to the charge pump for TX and RX can be set independently in systems .
However , when power supply is turned off , the charge pump output is placed in “HiZ” status regardless of
set value .
11. The division ratio of the programmable divider for reference frequency is given in 10-bit binary code .
For reference N (Fref) = 2*(20+22 to29) = 2* (5 to 1023) = 10 to 2046 : Only even number .
12. The division ratio of the programmable divider for TX and RX are given in 17-bit binary code .
For TX local N (FvcoTX) = 4096 to 131071
For RX local N (FvcoRX) = 4096 to 131071
13 Example Data ( 1 )
/ Condition
TX VCO frequency = 950 MHz , TX local and TXOUT frequency = 1.90 GHz
RX VCO frequency = 896.75 MHz , RX local frequency = 916 MHz
TX and RX are all on , TX Doubler on , RX Doubler off , RX Local Amp off
Charge pump current = 400A , volume level = -10 dB
Reference frequency = 10.25 MHz , Ch span = 250 kHz , Comparison frequency = 125 kHz
/ Setting
1) Control data 1 (when Power ON):
MSB”0000001100111111100”LSB
2) N (Fref) = 10.25MHz / 125 kHz = 82
Fref bit condition=82 / 2=41 :
MSB ”00000010100111” LSB
3) N (FvcoTX) = 950MHz / 125 kHz = 7600:
MSB ”0000111011011000001” LSB
4) N (FvcoRX) = 896.75Hz / 125 kHz = 7174:
MSB ”0000111000000011010” LSB
5) Control data 2 :
MSB ”0000001100111100000” LSB
Example Data ( 2 )
/Condition
TX VCO frequency = 907 MHz , TX local and TXOUT frequency = 907 MHz
RX VCO frequency = 955.125 GHz , RX local frequency = 1.91025 GHz
TX and RX are all on , TX Doubler off , RX Doubler on , RX Local Amp on
Charge pump current = 400 A , volume level = -10Db
Reference frequency = 10.25 MHz , Ch span = 250 kHz , Comparison frequency = 125 kHz
/Setting
1) Control data 1 (when Power ON):
MSB”0000000010111111100”LSB
2) N (Fref) = 10.25 MHz/125 kHz = 82
Fref bit condition=82 / 2=41:
MSB”00000010100111”LSB
3) N (FvcoTX) = 907 MHz / 125 kHz = 7256:
MSB”0000111000101100001”LSB
4) N (FvcoRX) = 955.125Hz / 125 kHz = 7641:
MSB”0000111011101100110”LSB
5) Control data 2:
MSB”0000000010111100000”LSB
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