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參數(shù)資料
| 型號(hào)： | WE905 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 0.1 - 1GHx Single Chip FM Transceiver |
| 中文描述： | 0.1 - 1GHx單芯片F(xiàn)M收發(fā)器 |
| 文件頁數(shù)： | 24/39頁 |
| 文件大?。?/td> | 623K |
| 代理商： | WE905 |
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Winceiver WE904/WE905
WiNEDGE & WiRELESS
0.1 - 1GHz Single Chip FM Transceiver
2003 WiNEDGE & WiRELESS PTE LTD
Page 30
Rev Date: 2003 May 27
MODE REGISTER
Bit 1 (Last bit loaded)
Load control bit 1 = (1)
Bit 2
Load control bit 2 = (1)
Bit 3
AGC (Automatic Gain Control)
0 = Off
1 = On
Bit 4
Receiver
0 = Off
1 = On
Bit 5
Transmitter
0 = Off
1 = On
Bit 6
Receive Charge Pump Current
0 = 0.2mA
1 = 1.0mA
Bit 7
Transmit Charge Pump Current
0 = 0.2mA
1 = 1.0mA
Bit 8
Rx Charge Pump Polarity
0 = Normal
1 = Invert
Bit 9
Tx Charge Pump Polarity
0 = Normal
1 = Invert
Bit 10
Mixer Gain Control
(Bit 1)
Bit 11
Mixer Gain Control
(Bit 2)
Bit 12
Baseband Gain & RF Pad Control
(Bit 1)
Bit 13
Baseband Gain & RF Pad Control
(Bit 2)
Bit 14
Baseband Gain & RF Pad Control
(Bit 3)
Bit 15
For WE904 AFC Polarity
0 = Normal
1 = Invert
For WE905 AGC Gain Reset
0 = Reset
1 = No Reset
Bit 16
AFC Enable
0 = Disable
1 = Enable
Bit 17
Audio/Data Output Select
0 = Analog
1 = Digital
Bit 18
Mode (Bit 1)
0 for Normal mode. See page 33 & 34 for other modes
Bit 19
Mode (Bit 2)
0 for Normal mode. See page 33 & 34 for other modes
Bit 20
Mode (Bit 3)
0 for Normal mode. See page 33 & 34 for other modes
Bit 21
Mode (Bit 4)
[Tse_0] in Normal Mode. See page 33 & 34 for other modes
Bit 22
Mode (Bit 5)
[Tse_1] in Normal Mode. See page 33 & 34 for other modes
RX GAIN CONTROL (BIT 3, 10-15, 18-19)
The receiver section includes a facility to switch overall gain to maintain linearity over a wide dynamic
range of on-channel signal levels. This can be done manually or automatically via an on-chip
automatic gain control (AGC) circuit.
Automatic Mode (Bit 3 = 1; AGC ON)
When this bit is set to 1, the receiver will set the internal gain stages according to the received signal
as shown in the following table.
Attenuation dB from maximum gain
Nominal RF
Signal Level
RF section
Baseband section
Increasing
Decreasing
RF Pad
RF Mixer
1
st Block
2
nd Block 3rd Block
4
th Block
< -92dBm
0
> -86dBm
< -82dBm
0
10
0
> -76dBm
< -72dBm
0
10
0
> -66dBm
< -62dBm
0
10
0
10
0
> -56dBm
< -52dBm
0
10
0
> -46dBm
< -42dBm
0
20
10
0
> -36dBm
< -32dBm
0
20
10
> -26dBm
< -22dBm
10
20
10
>-16dBm
10
30
10
In this mode, the mixer gain and baseband gain settings (bit 10-14) are ignored.
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