參數(shù)資料
型號(hào)： HSP50216KI
廠商： HARRIS SEMICONDUCTOR
元件分類(lèi)： 無(wú)繩電話(huà)/電話(huà)
英文描述： Four-Channel Programmable Digital DownConverter
中文描述： TELECOM, CELLULAR, BASEBAND CIRCUIT, PBGA196
封裝： BGA-196
文件頁(yè)數(shù)： 17/53頁(yè)
文件大?。?/td> 561K
代理商： HSP50216KI
17
62:53
Coefficient Memory
Block Start
Memory base address of coefficients, 0-1023, 0-511 are valid on the HSP50216.
63
Reserved
Set to 0
66:64
Coefficient Memory
Block Size
66:64
0
1
2
3
4
5
6
7
(Modulo addressing can be used, but is usually not needed. If not needed this bit field can always be set
to 7).
Memory Block Size
8
16
32
64
128
256
512
1024
75:67
Number of FIR
Outputs
Number of FIR outputs (range is 1 to 512, load w/ desired value minus 1).
This is usually equal to the total decimation that follows the filter.
84:76
Read Address
Pointer Step
Read address pointer step (for next run). This is usually equal to the filter decimation times the number
of outputs from the instruction.
93:85
Initial Address Offset
Initial address offset (to ADDRB). This is the offset from the start address to other end of filter.
For symmetric filters, usually equal to -1 x (number of taps -1).
95:94
Reserved
Set to 0
104:96
Memory Reads Per
FIR Output
This is based on the number of taps (load with value below minus 1).
Type
Symmetric, even number of taps
Symmetric, odd number of taps
Decimating HBF
Asymmetric
Complex
Resampling
Interpolating HBF
Value
(taps/2) or floor((taps+1)/2)
(taps+1)/2 or floor((taps+1)/2)
(taps+5)/4
taps
taps
taps/phase (six taps per phase for the ROM’d coefficients provided)
(taps+5)/4-1
106:105
Clocks Per
Memory Read
Set to 0 for all but complex FIR, which is set to 1.
115:107
Data Memory
Step Size 1
(ADDRA) Step size for all but the last tap computation of the FIR.
Set to -2 for HBF, -1 otherwise.
117:116
Data Memory
Step Size 2
(ADDRA) Step size for last tap computation. Set to -1.
117:116
Step size
0
0
1
-1
2
-2
3
step size value
119:118
Data Memory
Address Offset Step
(ADDRB) Step size for opposite end of symmetric filter. Set to +2 for Decimating HBF, to +1 for others
(the B data is not used for asymmetric, resampling, and complex filters).
INSTRUCTION BIT FIELDS (Continued)
BIT
POSITIONS
FUNCTION
DESCRIPTION
HSP50216
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