PEB 20570 F V3.1 Infineon Technologies, PEB 20570 F V3.1 Datasheet - Page 129
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PEB 20570 F V3.1
Manufacturer Part Number
PEB 20570 F V3.1
Description
IC LINE CARD CTRLR HDLC TQFP-100
Manufacturer
Infineon Technologies
Datasheet
1.PEB_20570_F_V3.1.pdf
(308 pages)
Specifications of PEB 20570 F V3.1
Function
Line Card Controller
Interface
ISDN
Voltage - Supply
3.13 V ~ 3.47 V
Current - Supply
272.6mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
100-LFQFP
Includes
Layer-1 Control, Signaling Control, Signal Processing, Voice Channel Handling
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Power (watts)
-
Number Of Circuits
-
Other names
PEB20570FV3.1X
PEB20570FV31XP
SP000007243
PEB20570FV31XP
SP000007243
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A-/µ-law to Linear Conversion
The conversion is done via a 512 x 16 ROM table. The low 256 bytes translate the A-law
value into linear, while the high 256 words translate the µ-law to linear.
The DSP issues a read cycle, in which the 8 MSBs of the 16-bit address represent the
ROM table address, and the 8 LSBs are the actual value which is to be converted. The
converted linear value is the contents read from the ROM. Note that no wait states are
required for this direction of conversion.
A-law values in the ROM are stored in the 13 MSBs. The 3 LSBs are always '0'. The µ-
law values in the ROM are stored in the 14 MSBs. The 2 LSBs are always '0'.
Linear to A-/µ-law Conversion
The conversion is done by dedicated hardware. The DSP programs the control register
to perform either A-law or µ-law conversion. The linear value is written into the Input
register (AMIR), and the A-law or µ-law value is read from the Output register (AMOR).
Note that this is only possible one cycle later.
Data Sheet
112
Functional Description
PEB 20570
PEB 20571
2003-07-31
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