PSB4860HV4.1 Lantiq, PSB4860HV4.1 Datasheet - Page 43

• Manufacturer Part Number: PSB4860HV4.1
• Manufacturer: Lantiq

Specifications of PSB4860HV4.1

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Table 8
Parameter # of Bytes Range
AG_INIT
COM
AG_ATT
AG_GAIN 1
AG_CUR
SPEEDL
SPEEDH
NOIS
LP
Note: There are two sets of parameters, one for AGCX and one for AGCR.
Note: By setting AG_GAIN to 0 dB a limitation function can be realized with the AGC.
2.1.3.7
Each signal path features an additional amplifier (LGAX, LGAR) that can be set to a fixed
gain. These amplifiers should be used for the basic amplification in order to avoid
saturation in the preceding stages. Table 9 describes the only parameter of this stage.
Table 9
Parameter # of Bytes Range
LGA
2.1.3.8
Table 10 shows the registers used to determine the signal sources and the
speakerphone mode.
Table 10
Register
SCTL
SCTL
SCTL
Data Sheet
Automatic Gain Control Parameters
Amplifiers with Fixed Gain
Fixed Gain Parameters
Mode Control
Speakerphone Control Registers
# of Bits
1
1
1
1
1
1
1
1
1
1
1
1
-95 dB to 95dB
0 to – 95 dB
0 to -95 dB
0 to 48 dB
-95 dB to 95 dB
0.25 to 62.5 dB/s
2 to 500 dB/s
0 to – 95 dB
0.025 to 16 ms
Name
ENS
ENC
MD
-30 dB to 12 dB always active
Comment
Echo suppression unit enable
Echo cancellation unit enable
Speakerphone or loudhearing mode
Comment
43
Comment
Initial AGC gain/attenuation
Compare level rel. to max. PCM-value
Attenuation range
Gain range
Current gain/attenuation
Change rate for lower levels
Change rate for higher levels
Threshold for AGC-reduction
by background noise
AGC low pass time constant
PSB 4860
2000-01-14