bt8960 Mindspeed Technologies, bt8960 Datasheet - Page 59

• Manufacturer Part Number: bt8960
• Description: Bt8960, Single-chip 2b1q Transceiver
• Manufacturer: Mindspeed Technologies

Bt8960
Single-Chip 2B1Q Transceiver
zero_output
adapt_gain[1,0]
3.2.10 0x09—Nonlinear Echo Canceller Modes Register (nonlinear_ec_modes)
negate_symbol
symbol_delay[2:0]
adapt_coefficients
zero_coefficients
zero_output
adapt_gain
negate_symbol symbol_delay[2] symbol_delay[1] symbol_delay[0]
7
Zero Output—Read/write control bit which, when set, zeros the echo replica before subtrac-
tion from the input signal. Achieves the affect of disabling or bypassing the echo cancellation
function. Does not disable coefficient adaptation. When cleared, normal echo Canceller opera-
tion is performed.
Adaptation Gain—Read/write binary field which specifies the adaptation gain.
Negate Symbol—Read/write control bit which, when set, inverts (2’s complement) the receive
signal path at the output of the nonlinear echo canceller. When cleared, the signal path is unaf-
fected. This function is independent of all other NEC mode settings.
Symbol Delay—Read/write binary field which specifies the number of symbol delays inserted
in the transmit symbol input path.
Adapt Coefficients—Same function as LEC Modes Register [linear_ec_modes; 0x08].
Zero Coefficients—Same function as LEC Modes Register.
Zero Output—Same function as LEC Modes Register.
Adaptation Gain—Read/write control bit which specifies the adaptation gain. When set, the
adaptation gain is eight times higher than when cleared.
6
adapt_gain[1,0]
5
00
01
10
11
4
N8960DSB
coefficients
adapt_
3
zero_coefficients
2
Normalized Gain
512
64
zero_output
1
4
1
3.1 Conventions
3.0 Registers
adapt_gain
0
49