Datasheet

PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
DS60001320B-page 464 Preliminary  2015 Microchip Technology Inc.
REGISTER 28-16: ADCFLTRx: ADC DIGITAL FILTER ‘x’ REGISTER (‘x’ = 1 THROUGH 6)
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R-0, HS, HC
AFEN DATA16EN DFMODE OVRSAM<2:0> AFGIEN AFRDY
23:16
U-0 U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
— — — CHNLID<4:0>
15:8
R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC
FLTRDATA<15:8>
7:0
R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC R-0, HS, HC
FLTRDATA<7:0>
Legend: HS = Hardware Set HC = Hardware Cleared
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 31 AFEN: Digital Filter ‘x’ Enable bit
1 = Digital filter is enabled
0 = Digital filter is disabled and the AFRDY status bit is cleared
bit 30 DATA16EN: Filter Significant Data Length bit
1 = All 16 bits of the filter output data are significant
0 = Only the first 12 bits are significant, followed by four zeros
Note: This bit is significant only if DFMODE = 1 (Averaging Mode) and FRACT (ADCCON1<23>) = 1
(Fractional Output Mode).
bit DFMODE: ADC Filter Mode bit
1 = Filter ‘x’ works in Averaging mode
0 = Filter ‘x’ works in Oversampling Filter mode (default)
bit 28-26 OVRSAM<2:0>: Oversampling Filter Ratio bits
If DFMODE is ‘
0’:
111 = 128 samples (shift sum 3 bits to right, output data is in 15.1 format)
110 = 32 samples (shift sum 2 bits to right, output data is in 14.1 format)
101 = 8 samples (shift sum 1 bit to right, output data is in 13.1 format)
100 = 2 samples (shift sum 0 bits to right, output data is in 12.1 format)
011 = 256 samples (shift sum 4 bits to right, output data is 16 bits)
010 = 64 samples (shift sum 3 bits to right, output data is 15 bits)
001 = 16 samples (shift sum 2 bits to right, output data is 14 bits)
000 = 4 samples (shift sum 1 bit to right, output data is 13 bits)
If DFMODE is ‘1’:
111 = 256 samples (256 samples to be averaged)
110 = 128 samples (128 samples to be averaged)
101 = 64 samples (64 samples to be averaged)
100 = 32 samples (32 samples to be averaged)
011 = 16 samples (16 samples to be averaged)
010 = 8 samples (8 samples to be averaged)
001 = 4 samples (4 samples to be averaged)
000 = 2 samples (2 samples to be averaged)
bit 25 AFGIEN: Digital Filter ‘x’ Interrupt Enable bit
1 = Digital filter interrupt is enabled and is generated by the AFRDY status bit
0 = Digital filter is disabled