Analog Devices SHARC ADSP-214 Series Hardware Reference Manual page 908

Peripheral Registers
31 30
FIR_UPSAMP
Up Sampling Enable
FIR_SRCEN
Sample Rate Conversion
Enable
15
WINDOW (23–14)
Window Size
Figure A-36. FIRCTL2 Register
Table A-48. FIRCTL2 Register Bit Descriptions (RW)
Bits
11–0
13–12
23–14
24
27–25
28
29
30
31
A-82
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29 28 27 26 25 24 23 22
14 13 12 11 10 9 8 7
Name Description
TAPLEN Tap Length. Programmable between 0–4095
Tap Length = TAPLEN + 1
Reserved
WINDOW Window Size. Programmable between 0–1023
Window Size = WINDOW+ 1. A window size of 1 corre-
sponds to sample based operation and the maximum win-
dow size is 1024.
Reserved
FIR_RATIO UP/DOWN Sampling Ratio.
Sampling Ratio = RATIO + 1
Reserved
FIR_SRCEN Sample Rate Conversion Enable.
0 = Disabled
1 = Enabled
FIR_UPSAMP Up Sampling Enable.
0 = Down Sampling
1 = Up sampling
Reserved
ADSP-214xx SHARC Processor Hardware Reference
21 20 19 18 17 16
WINDOW (23–14)
Window Size
FIR_RATIO
Up/Down Sampling Ratio
6 5 4 3 2 1 0
TAPLEN (11–0)
Tap Length