Afe Dsp Configuration Register - Analog Devices ADuCM355 Hardware Reference Manual

UG-1262
Bits Bit Name
2 SINC2RDY
1 DFTRDY
0 ADCRDY

AFE DSP CONFIGURATION REGISTER

Address: 0x400C20D0, Reset: 0x00000090, Name: DFTCON
Table 72. Bit Descriptions for DFTCON
Bits Bit Name Settings
[31:22] Reserved
[21:20] DFTINSEL
[19:8] Reserved
[7:4] DFTNUM
[3:1] Reserved
0 HANNINGEN
Settings Description
Low-Pass Filter Result Status. Supply rejection filter result ready interrupt.
User must write 1 to this bit to clear it. Writing 0 has no effect.
0 Interrupt not asserted.
1 Interrupt asserted. When set, indicates SINC2DAT result is ready for reading.
This bit generates an interrupt if ADCINTIEN, Bit 2 = 1.
DFT Result Ready Status. DFT result ready interrupt. User must write 1 to this
bit to clear it. Writing 0 has no effect.
0 Interrupt not asserted.
Interrupt asserted. When set, indicates DFTREAL and DFTIMAG registers are
1
ready for reading. This bit generates an interrupt if ADCINTIEN, Bit 1 = 1.
ADC Result Ready Status. ADC result ready interrupt. User must write 1 to this
bit to clear it. Writing 0 has no effect.
0 Interrupt not asserted.
1 Interrupt asserted. When set, indicates ADCDAT register is ready for reading.
This bit generates an interrupt if ADCINTIEN, Bit 0 = 1.
Description
Reserved.
DFT Input Select. ADCFILTERCON, Bit 7 is the highest priority. If ADCFILTERCON,
Bit 7 is 1, output of average block is used as the DFT input, regardless of the
DFTINSEL setting.
00 Supply filter output. Select output from low-pass supply filter.
01 Gain offset output with or without sinc3. Select output from ADC gain and offset
correction stage. If ADCFILTERCON, Bit 6 is 1 (filter is bypassed), ADC raw data
through gain or offset correction is the DFT input. If the SINC3BYP bit in the
ADCFILTERCON register is 0 (filter is not bypassed), the sinc3 output through gain
or offset correction is the DFT input.
10 ADC raw data. Select output direct from the ADC, no offset or gain correction.
Only supported for 800 kHz sample rate of ADC.
11 Supply filter output. Select output from low-pass supply filter. Same as 00.
Reserved.
ADC Samples Used. DFT number is 4 to 16,384.
0 DFT point number is 4. DFT uses 4 ADC samples.
1 DFT point number is 8. DFT uses 8 ADC samples.
10 DFT point number is 16. DFT uses 16 ADC samples.
11 DFT point number is 32. DFT uses 32 ADC samples.
100 DFT point number is 64. DFT uses 64 ADC samples.
101 DFT point number is 128. DFT uses 128 ADC samples.
110 DFT point number is 256. DFT uses 256 ADC samples.
111 DFT point number is 512. DFT uses 512 ADC samples.
1000 DFT point number is 1024. DFT uses 1024 ADC samples.
1001 DFT point number is 2048. DFT uses 2048 ADC samples.
1010 DFT point number is 4096. DFT uses 4096 ADC samples.
1011 DFT point number is 8192. DFT uses 8192 ADC samples.
1100 DFT point number is 16384. DFT uses 16,384 ADC samples.
Reserved.
Hanning Window Enable.
0 Disable Hanning window.
1 Enable Hanning window.
ADuCM355
Rev. B | Page 74 of 312
Hardware Reference Manual
Reset Access
0x0 R/W1C
0x0 R/W1C
0x0 R/W1C
Reset Access
0x0 R
0x0 R/W
0x0 R
0x9 R/W
0x0 R
0x0 R/W