AMC1210 Datasheet, PDF (35/47 Pages) Burr-Brown (TI) – Quad Digital Filter for 2nd-Order Delta-Sigma Modulator

AMC1210
www.ti.com
SBAS372A – APRIL 2006 – REVISED OCTOBER 2006
Data Registers (addresses 0x1D, 0x1F, 0x21 and 0x23)
The Data Registers store the latest data from either the sinc filter or the integrator output for each filter module.
The data is presented in two's complement 16-bit or 32-bit format. The bit DR in the Integrator Parameter
Register controls the bit width of the Data Register. It takes two bytes to read the 16-bit formatted data and four
bytes to read the 32-bit formatted data. The acknowledge flag for the appropriate filter module is cleared when
reading the Data Register. Table 24 describes the Data Register in 16-bit formatting.
Table 24. Data Register (16-Bit Format)
Bit 15
D15
Bit 14
D14
Bit 13
D13
Bit 12
D12
Bit 11
D11
Bit 10
D10
Bit 9
D9
Bit 8
D8
Bit 7
D7
Bit 6
D6
Bit 5
D5
Bit 4
D4
Bit 3
D3
Bit 2
D2
Bit 1
D1
Bit 0
D0
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
BIT POSITION
15–0
BIT
D15–D0
DESCRIPTION
Data from the sinc filter or the integrator filter in 16-bit formatting.
Table 25 describes the Data Register in 32-bit formatting.
Bit 31
D31
Bit 30
D30
Bit 29
D29
Bit 28
D28
Table 25. Data Register (32-Bit Format)
Bit 27
D27
Bit 26
D26
Bit 25
D25
Bit 24
D24
Bit 23
D23
Bit 22
D22
Bit 21
D21
Bit 20
D20
Bit 19
D19
Bit 18
D18
Bit 17
D17
Bit 16
D16
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Bit 15
D15
Bit 14
D14
Bit 13
D13
Bit 12
D12
Bit 11
D11
Bit 10
D10
'0'
'0'
'0'
'0'
'0'
'0'
R
R
R
R
R
R
Bit 9
D9
'0'
R
Bit 8
D8
'0'
R
Bit 7
D7
'0'
R
Bit 6
D6
'0'
R
Bit 5
D5
'0'
R
Bit 4
D4
'0'
R
Bit 3
D3
'0'
R
Bit 2
D2
'0'
R
Bit 1
D1
'0'
R
Bit 0
D0
'0'
R
BIT POSITION
31–0
BIT
D31–D0
DESCRIPTION
Data from the sinc filter or the integrator filter in 32-bit formatting.
Time Registers (addresses 0x1E, 0x20, 0x22 and 0x24)
The Time Registers store the latest time information for each filter module. The data is presented in straight
binary 16-bit format. The bit TMx in the Control Parameter Register controls the mode of the time measure unit.
Table 26 describes the Time Registers.
Table 26. Time Registers
Bit 15
TD15
Bit 14
TD14
Bit 13
TD13
Bit 12
TD12
Bit 11
TD11
Bit 10
TD10
Bit 9
TD9
Bit 8
TD8
Bit 7
TD7
Bit 6
TD6
Bit 5
TD5
Bit 4
TD4
Bit 3
TD3
Bit 2
TD2
Bit 1
TD1
Bit 0
TD0
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
'0'
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
BIT POSITION
15–0
BIT
TD15–TD0
Data from the time measure unit.
DESCRIPTION
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