Table 63. Register 59: ADC CIC Filter Gain Control Field Descriptions
Bit |
Field |
Type |
Reset |
Description |
7:4 |
L-CIC FILT GAIN |
R/W |
0100h |
Left CIC filter gain(1)
|
3:0 |
R-CIC FILT GAIN |
R/W |
0100h |
Right CIC filter gain(1)
|
(1) For proper operation, the CIC gain must be ≤ 1.
If AOSR (page 0, register 20) = 64 and [1 ≤ Filter Mode (page 0, register 61) ≤ 6], then the reset value of 4 results in CIC gain = 1.
Otherwise, the CIC gain = [AOSR / (64 × Digital Filter Engine Decimation)]4 × 2 (CIC Filter Gain Control) for 0 ≤ CIC Filter Gain Control ≤ 12,
and if CIC Filter Gain Control = 15, CIC gain is automatically set such that for 7 ≤ (AOSR / Digital Filter Engine Decimation) ≤ 64,
0.5 < CIC gain ≤ 1.