參數(shù)資料
型號(hào)： AMC1210IRHARG4
英文描述： Quad Digital Filter for 2nd-Order Delta-Sigma Modulator
中文描述： 四數(shù)字濾波器2階Δ-Σ調(diào)制器
文件頁(yè)數(shù)： 29/47頁(yè)
文件大?。?/td> 805K
代理商： AMC1210IRHARG4
www.ti.com
Sinc Filter Parameter Register (addresses 0x02, 0x08, 0x0E,and 0x14)
The Sinc Filter Parameter Register includes the oversampling ratio (OSR), filter enable, structure and signal
mode control bits.
Table 15
shows the Sinc Filter Parameter Register.
Integrator Parameter Register (addresses 0x03, 0x09, 0x0F and 0x15)
The Integrator Parameter Register controls the integrator functionality. It specifies the integrator oversampling
ratio, mode select, shift control, integrator and demodulation enable and data representation control bits.
Table 16
shows the Integrator Parameter Register.
AMC1210
SBAS372A–APRIL 2006–REVISED OCTOBER 2006
Table 15. Sinc Filter Parameter Register
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
–
–
–
–
SST1
SST0
AE
FEN
SOSR7
SOSR6
SOSR5
SOSR4
SOSR3
SOSR2
SOSR1
SOSR0
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
R
R
R
R
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
BIT POSITION
15–12
11–10
BIT
–
DESCRIPTION
Unused. Always read '0'.
Sinc filter structure.
00: Sinc filter runs with a sincfast structure
01: Sinc filter runs with a Sinc
1
structure
10: Sinc filter runs with a Sinc
2
structure
11: Sinc filter runs with a Sinc
3
structure
Acknowledge enable.
0: The acknowledge flag is disabled for the particular filter
1: The acknowledge flag is enabled for the particular filter
Filter enable.
0: The filter is disabled and no data is produced
1: The filter is enabled and data are produced in the sinc filter and/or integrator
Oversampling ratio. The actual rate is SOSR + 1.
These bits set the oversampling ratio of the filter.
0xFF represents an oversampling ratio of 256.
SST1–SST0
9
AE
8
FEN
7–0
SOSR7–SOSR0
Table 16. Integrator Parameter Register
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
SH4
SH3
SH2
SH1
SH0
DR
DEN
IEN
IMOD
IOSR6
IOSR5
IOSR4
IOSR3
IOSR2
IOSR1
IOSR0
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
BIT POSITION
15–11
BIT
DESCRIPTION
SH4–SH0
Shift control.
These bits indicate by how many bits the 16-bit window is shifted up when 16-bit data
representation is chosen.
Data representation.
0: The data is stored in 16-bit two's complement
1: The data is stored in 32-bit two's complement
Demodulation enable.
0: The demodulation for resolver applications is disabled
1: The demodulation for resolver applications is enabled
Integrator enable.
0: The data from the sinc filter output is stored in the register map
1: The data from the integrator is stored in the register map
Integrator mode.
0: The oversampling mode updates the data output of the integrator
1: The selected sample-and-hold signal updates the data output of the integrator
Oversampling ratio. The actual rate is IOSR + 1.
These bits set the oversampling ratio of the integrator.
0x03 represents an oversampling ratio of 4.
10
DR
9
DEN
8
IEN
7
IMOD
6–0
IOSR6–IOSR0
29
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