AMC1210_14 Datasheet, PDF (37/54 Pages) Texas Instruments – Quad Digital Filter for 2nd-Order Delta-Sigma Modulator

AMC1210
www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009
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 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
D15 D14 D13 D12 D11 D10 D9
D8
D7
D6
D5
D4
D3
D2
D1
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 Bit 26 Bit 25 Bit 24 Bit 23 Bit 22 Bit 21 Bit 20
D27 D26 D25 D24 D23 D22 D21 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 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9
D15 D14 D13 D12 D11 D10 D9
Bit 8
D8
Bit 7
D7
Bit 6
D6
Bit 5
D5
Bit 4
D4
Bit 3
D3
Bit 2
D2
'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
BIT POSITION
31–0
BIT
D31–D0
DESCRIPTION
Data from the sinc filter or the integrator filter in 32-bit formatting.
Bit 1
D1
'0'
R
Bit 0
D0
'0'
R
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 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
TD15 TD14 TD13 TD12 TD11 TD10 TD9 TD8 TD7 TD6 TD5 TD4 TD3 TD2 TD1 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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