u4255bm ATMEL Corporation, u4255bm Datasheet - Page 5

• Manufacturer Part Number: u4255bm
• Description: Am/fm Receiver
• Manufacturer: ATMEL Corporation

3-Wire Bus Description
Data Transfer
Rev. A1, 26-Jun-00
EN
A24_100
MSB
ADDR. AM/FM/WB Gain-FM
1 0 0
A24_101
MSB
ADDR.
1 0 1
A8_100
MSB
ADDR.
1 0 0
A8_101
MSB
ADDR.
1 0 1
DATA
8-bit command
EN
DATA
CLK
24-bit command
CLK
e.g., R-Divider
BYTE 1
BYTE 1
LSB
WB-
Demod-Gain
Test
Optimize
BYTE 3
BYTE 3
B72
LSB
AM
B93
B9
0
2
B4
0
0
MPoff Mute
B71
2
B92
FM
B8
1
Band width
2
B3
Start Smute
B70
2
IF-amplifier
B91
B7
BYTE 1
BYTE 1
2
3
B69
B90
B2
NK-Sensor
2
B6
4
LSB
LSB
LSB
LSB
B68
B89
B1
2
B5
5
R–Divider
MSB
Smute
MSB
Search Width of window
B67
B0
2
B88
6
MSB
MSB
2
7
Tk-fmzf
B87
B66
LSB
2
8
B86
2
FM AGC
B65
BYTE 2
9
BYTE 2
Figure 3. Pulse diagram
B85
2
10
B64
2
OSC-divider/multipath
sensitivity
B84
11
BYTE 2
AM-AGC
B63
2
12
B83
B62
2
13
B82
FM BW IF2
2
B61
LSB
14
LSB
B81
MSB
2
15
B60
LSB
P–2
MSB
Field
strength
B80
MSB
IF2 center frequency
0
B59
P–2
Status 0
1
B58
BWmpx.
P–2
B79
2
OSCB
B57
BYTE 3
Time window stop signal
B78
IPD3
IPD4 IPD2
B56
BYTE 1
U4255BM
BYTE 1
IPD1
B77
MP FS
B55
B76
0
Addr.
FM ext
MSB
B54
0
B75
Not used
B74
B53
14857
x
5 (12)
LSB
LSB
B73
B52
x