Datasheet
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PCM1870
SLAS544A – MAY 2007 – REVISED SEPTEMBER 2007
Registers 97 – 100
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Register 97 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 F107 F106 F105 F104 F103 F102 F101 F100
Register 98 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 F115 F114 F113 F112 F111 F110 F109 F108
Register 99 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 F207 F206 F205 F204 F203 F202 F201 F200
Register 100 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 F215 F214 F213 F212 F211 F210 F209 F208
IDX[6:0]: 110 0001b (61h) Register 97
IDX[6:0]: 110 0010b (62h) Register 98
IDX[6:0]: 110 0011b (63h) Register 99
IDX[6:0]: 110 0100b (64h) Register 100
F[107:100]: Lower 8 Bits of Coefficient a
1
for First-Stage Notch Filter
F[115:108]: Upper 8 Bits of Coefficient a
1
for First-Stage Notch Filter
F[207:200]: Lower 8 Bits of Coefficient a
2
for First-Stage Notch Filter
F[215:208]: Upper 8 Bits of Coefficient a
2
for First-Stage Notch Filter
Default value: 0000 0000
These bits are used to change the characteristics of the first-stage notch filter. See Calculating Filter Coefficients
for details.
Registers 101 – 104
B15 B14 B13 B12 B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
Register 101 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 S107 S106 S105 S104 S103 S102 S101 S100
Register 102 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 S115 S114 S113 S112 S111 S110 S109 S108
Register 103 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 S207 S206 S205 S204 S203 S202 S201 S200
Register 104 0 IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 S215 S214 S213 S212 S211 S210 S209 S208
IDX[6:0]: 110 0101b (65h) Register 101
IDX[6:0]: 110 0110b (66h) Register 102
IDX[6:0]: 110 0111b (67h) Register 103
IDX[6:0]: 110 1000b (68h) Register 104
S[107:100]: Lower 8 Bits of Coefficient a
1
for Second-Stage Notch Filter
S[115:108]: Upper 8 Bts of Coefficient a
1
for Second-Stage Notch Filter
S[207:200]: Lower 8 Bits of Coefficient a
2
for Second-Stage Notch Filter
S[215:208]: Upper 8 Bits of Coefficient a
2
for Second-Stage Notch Filter
Default value: 0000 0000
These bits are used to change the characteristics of the second-stage notch filter. See Calculating Filter
Coefficients for details.
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