VS1005g Datasheet
10 VS1005 PERIPHERALS AND REGISTERS
AD_CF_AD23_FLP register flips the input of filters 2 and 3.
FM decimation filter is used when FM is enabled and it decimates the FM signals to 32kHz. The
filter can be used in cascade with other filters. Register AD_CF_DEC6SEL is used to select
filter input.
Decimation filter input selection
AD_CF:DEC6SEL Filter input
11 or 10 mono AD (left = right)
01 stereo ADs
00 FM demodulator
AD_CF_AD3FS and AD_CF_ADFS registers select the AD filters’s decimation factor (sample
rate). Exact sample rate is xtal dependent.
Decimation factor
Register Decimation factor Sample rate @ 12.288 MHz xtal
11
10
01
00
256
128
64
24 kHz
48 kHz
96 kHz
192 kHz
32
AD_LEFT, AD_LEFT_LSB, AD_RIGHT, AD_RIGHT_LSB, MONO_AD and MONO_AD_LSB
are the three AD filters’s output data registers. As a new data sample is calculated also an
interrupt request is generated.
Version: 0.2, 2012-03-16
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