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參數資料
| 型號： | U4255BM-AFNG3 |
| 英文描述： | AM/FM Receiver Circuit |
| 中文描述： | 調幅/調頻接收機電路 |
| 文件頁數： | 7/14頁 |
| 文件大小： | 139K |
| 代理商： | U4255BM-AFNG3 |
U4255BM
Rev. A2, 11-Oct-00
7 (14)
Bus Control
The operating mode is set by the Bits 92 and 93.
AM/FM/Weather Channel
Bit 93
Bit 92
Standby
0
0
FM
0
1
AM
1
0
Weather band
1
1
The Bits 89 to 91 control gain of the FM IF amplifier.
Gain FM-IF
Bit 91
Bit 90
Bit 89
19 dB
0
0
0
21 dB
0
0
1
23 dB
0
1
0
25 dB
0
1
1
27 dB
1
0
0
28 dB
1
0
1
29 dB
1
1
0
30 dB
1
1
1
Bit 88 switches the search mode on/off.
Station Search
Bit 88
Receive
0
Search
1
Bits 85 to 87 select the search-stop deviation from the
center frequency.
Search-Stop Window
Bit 87
Bit 86
Bit 85
0.5 kHz
0
0
0
1.1 kHz
0
0
1
2.3 kHz
0
1
0
4.8 kHz
0
1
1
10 kHz
1
0
0
20 kHz
1
0
1
40 kHz
1
1
0
80 kHz
1
1
1
In AM mode (Bits 92 and 93), Bits 81 to 83 set the divide
factor of the AM prescaler
Divider
AM Mixer 1
Bit 93
Bit 92
Bit 84
Bit 83
Bit 82
Bit 81
Divide by 10
1
0
x
0
0
0
Divide by 6
1
0
x
0
0
1
Divide by 7
1
0
x
0
1
0
Divide by 8
1
0
x
1
0
0
Divide by 4
1
0
x
1
0
1
In FM mode and in weather band mode (bit 92), the Bits 81
to 84 set the sensitivity of the MNC
Sensitivity
Multipath
Bit 93
Bit 92
Bit 84
Bit 83
Bit 82
Bit 81
Off
x
1
0
0
0
0
Low
x
1
0
0
0
1
x
1
0
0
1
0
x
1
0
0
1
1
x
1
0
1
0
0
x
1
0
1
0
1
x
1
0
1
1
0
Normal
x
1
0
1
1
1
x
1
1
0
0
0
x
1
1
0
0
1
x
1
1
0
1
0
x
1
1
0
1
1
x
1
1
1
0
0
x
1
1
1
0
1
x
1
1
1
1
0
High
x
1
1
1
1
1
Bit 80 switches between narrow band field strength informa-
tion and wide band field strength information.
Field Strength
Narrow Band / Wide Band
Field strength at Pin 16 (wide band)
Bit 80
0
Field strength from AGC (narrow band)
1
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相關代理商/技術參數 |
參數描述 |
|---|---|
| U4255BM-M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AM/FM car receiver IC |
| U4255BM-MFN | 功能描述:IC RCVR AM/FM FRONT-END 44-SSOP RoHS:否 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數據傳輸率 - 最大:- 調制或協議:- 應用:* 電流 - 接收:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| U4255BM-MFNG3 | 功能描述:IC RCVR AM/FM FRONT-END 44-SSOP RoHS:是 類別:RF/IF 和 RFID >> RF 接收器 系列:- 產品培訓模塊:Lead (SnPb) Finish for COTS 產品變化通告:Product Discontinuation 09/Jan/2012 標準包裝:50 系列:* 頻率:850MHz ~ 2.175GHz 靈敏度:- 數據傳輸率 - 最大:- 調制或協議:- 應用:* 電流 - 接收:* 數據接口:PCB，表面貼裝 存儲容量:- 天線連接器:PCB，表面貼裝 特點:- 電源電壓:4.75 V ~ 5.25 V 工作溫度:0°C ~ 85°C 封裝/外殼:40-WFQFN 裸露焊盤 供應商設備封裝:40-TQFN-EP（6x6） 包裝:托盤 |
| U4256BM | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer for Radio Tuning |
| U4256BM-AFS | 制造商:TEMIC 制造商全稱:TEMIC Semiconductors 功能描述:Frequency Synthesizer for Radio Tuning |
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