ATR4258 Datasheet, PDF (22/38 Pages) ATMEL Corporation – AM/FM RECEIVER IC

Data Transfer
Table 36. Control Registers
A24_100
MSB
BYTE 3
LSB MSB
BYTE 2
LSB MSB
BYTE 1
LSB
ADDR.
Demodulator
AM/FM/WB
Gain FM
IF amplifier
Search Width of window
AM OSC
divider/multipath
sensitivity
Field
strength
BW/
MPX/
LPF/
Time window stop signal
1 00
B93 B92 B91 B90 B89 B88 B87 B86 B85 B84 B83 B82 B81 B80 B79 B78 B77 B76 B75 B74 B73
A24_101
MSB
ADDR.
1 01
BYTE 3
LSB MSB
BYTE 2
1^st
WB-
Demod-gain
Start soft mute
threshhold
Soft
mute
depth
Tk-
FM IF
AGC
threshold
AM/FM
IF1
ampl.
AM/
FM
Mixer
+
AGC
AM/
FM
LSB MSB
BYTE 1
LSB
BW 2^nd
mixer
Int. IF2 reference shift
IFOUT
pin 20
IF2IN
pin 28
Dem.
Contr.
Gain
local
OSC
B72 B71 B70 B69 B68 B67 B66 B65 B64 B63 B62 B61 B60 B59 B58 B57 B56 B55 B54 B53 B52
A24_111
MSB
ADDR.
1 11
BYTE 3
LSB MSB
BYTE 2
LSB MSB
BYTE 1
LSB
AGC
Local
OSC
Do not change (test mode bits)
Offset field strength (Pin 9)
Band-path filter
Fieldst.
(pin 9)
Local OSC
prescaler
(VCO buffer)
0 0000 0
0 00
B30 B29 B28 B27 B26 B25 B24 B23 B22 B21 B20 B19 B18 B17 B16 B15 B14 B13 B12 B11 B10
A8_100
MSB
ADDR.
1 00
BYTE 1
Test
mode
MP
0
B9 B8
LSB
Mute
(pin 11)
Reset
MP/
ADJ
Noise-
blanker
B7 B6 B5
A8_101
MSB
ADDR.
1 01
BYTE 1
MP
INT
B4 B3
LSB
Band-path filter
Band width
B2 B1 B0
22 ATR4258
4838A–AUDR–10/04