TDA7705_10 Datasheet, PDF (31/42 Pages) STMicroelectronics – Highly integrated tuner for AM/FM car radio

TDA7705
Front-end processing
Table 23. Register 0x01
Register number
MSB
LSB
Register definition
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FM mixer input selector
01
10
input #1
10
01
input #2
FM mixer gain
0
high
1
low
FM AGC time constant
0
normal
1
fast
FM AGC output mode
00
normal
01
constant 15 mA
10
constant 1 mA
Table 24. Register 0x02
Register number
MSB
LSB
Register definition
23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
FM RF AGC threshold @
mixin
0 0 87 dBµV
0 1 89 dBµV
1 0 91 dBµV
1 1 93 dBµV
FM iF AGC threshold @
IFADC in
00
120 dBµV
01
122 dBµV
10
124 dBµV
Tuning DAC enable
0
off
1
on
Tuning DAC programming⁽¹⁾
00000000
0
00000001
1
……………………
…
11111110
510
11111111
511
1. Normally handled by tuner drivers.
Doc ID 15938 Rev 8
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