QF1DA512-DK Quickfilter Technologies LLC, QF1DA512-DK Datasheet - Page 24

• Manufacturer Part Number: QF1DA512-DK
• Description: KIT DEV FOR QF1DA512
• Manufacturer: Quickfilter Technologies LLC
• Series: SavFIRe™r

Specifications of QF1DA512-DK

• Main Purpose: Filters, Digital Filter Design
• Embedded: Yes, ASIC
• Utilized Ic / Part: QF1Da512
• Primary Attributes: 1 512 Tap FIR Filter, 12 ~ 24 Bit
• Secondary Attributes: Quickfilter Software Design Tool GUI, Works from 10 ~ 500ksps ADC Data Rates
• For Use With: WM2582 - EVALDI EARBUDS TYPE Y686-1006 - BOARD MSP-MOJO + EXPANSION HEADR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 686-1010

→ 9
→ 10
→ 11
→ 12
Rev A8 January 7, 2009
08h DECIMATE (Down-sampling Rate)
09h HD_OFFSET (Offset of Header Field)
0Ah HD_SIZE (Size of Header Field)
0Bh HD_MASK (Header Data Valid Mask)
POR
Bits
DEC7-
DEC0
POR
Bits
HDOFF7-
HDOFF0
POR
Bits
HDSIZ7-
HDSIZ0
POR
Bits
HDMSK7-
HDMSK0
Sets the down-sampling rate from 1 (no down-sampling) to 256. The downsampling block only
processes every nth incoming sample, and ignores all of the others. If the input signal has frequencies
above ½ of the downsampled rate, aliasing of the upper frequencies will occur into the lower band. This
is usually not desirable. Note that the actual output frame rate is not reduced. Instead, the output value
is duplicated X number of times on the dSDO output, X being the downsampling rate plus 1. The
register must be set to 0 if DUP = 1 or if this chip is used with any dual channel formats.
00h = No down sampling,
Else = Down-sampling rate, range varies from 1 to 255 (for down-sampling rate of 2 to 256 respectively)
Sets the offset in bits in the data word of the header.
Header field offset in bits, range 0 to 255, default = 0h.
Sets the size of the header field
Header field size in bits, range 0 to 8, default = 0h.
Sets the bits of the header which are used to indicate the data valid condition of the sample.
Header data valid bits, default = 0h.
UNUSED
HDMSK7
HDOFF7
DEC7
Bit 7
W/R
Bit 7
W/R
Bit 7
Bit 7
W/R
0
0
0
X
0
UNUSED
HDMSK6
HDOFF6
DEC6
Bit 6
W/R
Bit 6
W/R
Bit 6
Bit 6
W/R
0
0
0
X
0
PRELIMINARY DATA SHEET
UNUSED
HDMSK5
HDOFF5
DEC5
Bit 5
W/R
Bit 5
W/R
Bit 5
Bit 5
W/R
0
0
0
X
0
24
UNUSED
HDMSK4
HDOFF4
DEC4
Bit 4
W/R
Bit 4
W/R
Bit 4
Bit 4
W/R
0
0
0
X
0
HDMSK3
HDOFF3
HDSIZ3
DEC3
Bit 3
W/R
Bit 3
W/R
Bit 3
W/R
Bit 3
W/R
0
0
0
0
HDMSK2
HDOFF2
HDSIZ2
DEC2
Bit 2
W/R
Bit 2
W/R
Bit 2
W/R
Bit 2
W/R
0
0
0
0
HDMSK1
HDOFF1
HDSIZ1
DEC1
Bit 1
W/R
Bit 1
W/R
Bit 1
W/R
Bit 1
W/R
0
0
0
0
www.quickfiltertech.com
HDMSK0
HDOFF0
HDSIZ0
DEC0
Bit 0
W/R
Bit 0
W/R
Bit 0
W/R
Bit 0
W/R
0
0
0
0
QF1Da512