qf4a512 ETC-unknow, qf4a512 Datasheet - Page 48

• Manufacturer Part Number: qf4a512
• Description: 4-channel Programmable Signal Converter Psc
• Manufacturer: ETC-unknow

Description: Bypasses the FIR filter (filter 0).
33h AREC_1_GAIN (AREC gain control)
Address 33h D7
34h AREC_1_GAIN (AREC gain control)
Address 34h D15 D14 D13 D12 D11 D10 D9
Description: AREC gain control, default value = 4000. This is a function of the CIC “R” value and along with CIC_SHIFT (3Ah) is
calculated automatically by the Quickfilter Pro software.
35h CHPC_1_DIV (Chopper divider setting)
Address 35h D7
36h CHPC_1_DIV (Chopper divider setting)
Address 36h D15 D14 D13 D12 D11 D10 D9
Description: Sets the frequency for the chopper circuit. Default value = 0, which turns off the chopper circuit. When a value is written
here the chopper frequency is equal to the ADC_CLK divided by this value.
37h CIC_1_R (CIC decimation, R value)
Address 37h D7
38h CIC_1_R (CIC decimation, R value)
Address 38h D15 D14 D13 D12 D11 D10 D9
39h CIC_1_R (CIC decimation, R value)
Address 39h
Description: CIC decimation rate factor minus 1 (R-1), default value = 8. Effective sampling rate for the channel is the ADC_CLK
divided by (Number of channels * 4). See Section 7.2)
3Ah CIC_1_SHIFT (CIC shift)
Address 3Ah
Description: CIC shift value, default; value = 0. This is a function of the CIC “R” value and along with AREC_GAIN (33h, 34h) is
calculated automatically by the Quickfilter Pro software.
Rev C5, Jan 07
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
X
X
D6
D6
D6
D6
X
D5
D5
D5
D5
X
D4
D4
D4
D4
X
D3
D3
D3
D3
X
D2
D2
D2
D2
X
D1
D1
D1
D1
X
D16
D0
D8
D0
D8
D0
D8
D0
PRELIMINARY
48
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QF4A512