PSB21473FV13XT Infineon Technologies, PSB21473FV13XT Datasheet - Page 396

• Manufacturer Part Number: PSB21473FV13XT
• Manufacturer: Infineon Technologies

Specifications of PSB21473FV13XT

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.6V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 144
• Lead Free Status / RoHS Status: Compliant

Data Sheet
2.
3.
Table 20-14 shows the registers associated with the line echo canceller.
Table 20-14 Line Echo Cancellation Unit Registers
Register
LECCTL
LECCTL
LECCTL
LECCTL
LECCTL
LECCTL
LECLEV
LECATT
LECMGN 15
The adaptation of the coefficients can be stopped by setting bit AS in register LECCTL.
This holds for all modes of the Line Echo Canceller. Furthermore for superior mode, also
the copying of the coefficients from the shadow FIR is disabled.
20.1.5
The DSP contains a DTMF detector that recognizes the sixteen standard DTMF tones
(for performance characteristics refer to Chapter 26.11). Figure 20-19 shows a block
diagram of the DTMF detector.The results of the detector are available in the status and
a dedicated result register.
The attenuation of the shadow FIR filter ATTS is better than the attenuation of the
actually used FIR filter ATTA by a margin MGN. Note that parameter MGN has now a
different meaning than in normal mode
The current attenuation ATTS of the shadow FIR is better than at any time since last
update according to condition 2.
TTS t
ATTS ATTA
–
DTMF Detector
# of Bits Name Comment
1
2
1
1
5
5
15
15
max ATTS t 1
MGN
EN
CM
AS
SP
I2
I1
MIN
ATT
MGN
–
Line echo canceller enable
Select normal mode, superior mode or
extended mode
Adaptation stop
Adaptation speed
Input signal selection for I
Input signal selection for I
Minimal power for signal I
Externally provided attenuation (I
Margin
ATTS last time condition 2 has been valid
396
1
2
1
Digital Signal Processor
1
to I
2
) all
Relevant Mode
all
all
extended
all
all
all
all
PSB 21473
2003-03-31
INCA-D