AMC1210_14 Datasheet, PDF (31/54 Pages) Texas Instruments – Quad Digital Filter for 2nd-Order Delta-Sigma Modulator

AMC1210
www.ti.com.............................................................................................................................................................. SBAS372D – APRIL 2006 – REVISED MAY 2009
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.
Bit 15
SH4
Bit 14
SH3
Bit 13
SH2
Bit 12
SH1
Table 16. Integrator Parameter Register
Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
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
10
9
8
7
6–0
BIT
SH4–SH0
DR
DEN
IEN
IMOD
IOSR6–IOSR0
DESCRIPTION
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.
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