PEF 20954 HT V1.1 Infineon Technologies, PEF 20954 HT V1.1 Datasheet - Page 121

• Manufacturer Part Number: PEF 20954 HT V1.1
• Description: IC ECHO CANCELLER DGTL TQFP144
• Manufacturer: Infineon Technologies

Specifications of PEF 20954 HT V1.1

• Function: Smart Integrated Digital Echo Canceller (SIDEC)
• Interface: PCM, Serial, UCC
• Number Of Circuits: 1
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Supply: 350mA
• Power (watts): 900mW
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 144-LFQFP
• Includes: Double Talk Detection
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: PEF20954HTV1.1; SP000007505

NOSYNC
AFR[4:0]
Note: Read access to this register is identified as acknowledge for the UCC interrupt and
should be read after UCCOLD and UCCNEW. This access resets the bit
STATUS.UCCPOLL and enables a new UCC interrupt.
AFCD1[7:0] (Addr.: 7BH): AFI Filter Coefficient Data 1
Read access to this register is identified as acknowledgment for the coefficient availibility
(CA) interrupt. If an additional access to register AFCD2 and (or) AFCD3 is necessary,
register AFCD1 should be read after AFCD2 and (or) AFCD3. This access resets the bit
STATUS.CAPOLL and enables a new CA interrupt. The conversion from the 14 bit
register value to the linear value is depicted in
COEF[13:6]
AFCD2[7:0] (Addr.: 7CH): AFI Filter Coefficient Data 2
ISLAST
COEF[5:0]
Table 37
Data Sheet
S 0 0 0 A B C D E F G H I
S 0 0 1 A B C D E F G H I
S 0 1 0 A B C D E F G H I
S 0 1 1 A B C D E F G H I
1
3
ISLAST
COEF
AFI Coefficient Register Value
[13]
1
2
1
1
1
0 9
COEF
AFI Coefficients to Absolute Linear Value Conversion
[12]
8 7 6 5 4 3 2 1 0 1
-
'0': modified data valid
'1': UCC unit is not synchronized to SYNCI pulse, i.e. the SYNCI
'0': UCC unit is synchronized to SYNCI pulse, i.e. a SYNC pulse with
detected
value corresponds to the UCC frame that was modified
'1': COEF is last coefficient for channel readout
LSB of monitored coefficient. The conversion from the 14 bit register
value to the linear value is depicted in
MSB of monitored filter coefficient
pulse period is not an integer multiple of 32 UCC frames (4ms).
a period of an integer multiple of 32 UCC frames (4ms) was
COEF
COEF
[11]
[5]
COEF
COEF
[10]
J S 0 0 0 0 0 0 0 A B C D E F G H I
J S 0 0 0 0 0 0 1 A B C D E F G H I
J S 0 0 0 0 0 1 A B C D E F G H I
J S 0 0 0 0 1 A B C D E F G H I
[4]
7
1
6
121
1
5
COEF
COEF
Table
1
4
[9]
[3]
1
3
1
2
37.
1
1
Linear Value
COEF
COEF
Table
1
0
[2]
[8]
9 8 7 6 5 4 3 2 1 0
37.
Register Description
COEF
COEF
[7]
[1]
Rev. 2, 2004-07-28
PEB 20954
PEF 20954
COEF
COEF
J 0 0
[6]
[0]
J 0
J
J