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T4258-ILQ Datasheet(PDF) 9 Page - ATMEL Corporation

Part # T4258-ILQ
Description  AM/FM Receiver IC
Download  17 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T4258-ILQ Datasheet(HTML) 9 Page - ATMEL Corporation

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T4258
Rev. A1, 10-Jan-01
9 (17)
Pulse Diagram
8-bit command
EN
CLK
DATA
LSB
MSB
BYTE 1
24-bit command
16-bit command
DATA
CLK
LSB
LSB
MSB
MSB
BYTE 1
BYTE 2
EN
EN
CLK
DATA
LSB
LSB
MSB
MSB
BYTE 3
BYTE 2
MSB
LSB
BYTE 1
EN
Figure 4. Pulse diagram
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 the 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 the search-stop deviation from the
center frequency ans AM noiseblanker sensitivity
AM Noise-
blanker
Sensitivity
Search-
stop
window +
Bit 87
Bit 86
Bit 85
Low
0.5 kHz
0
0
0
1.1 kHz
0
0
1
2.3 kHz
0
1
0
Normal
4.8 kHz
0
1
1
10 kHz
1
0
0
20 kHz
1
0
1
40 kHz
1
1
0
High
80 kHz
1
1
1


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