PEB2465 SIEMENS [Siemens Semiconductor Group], PEB2465 Datasheet - Page 80

• Manufacturer Part Number: PEB2465
• Description: Four Channel Codec Filter
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

PEB 2465
Appendix
10.3.3 Level Metering Function
The Level Metering Function is a functional selftest (available per channel), which allows
selftest of the chip (digital, or digital and analogue), and also selftest of the board
(including the SLIC).
An external or internally generated sine-wave signal is fed to the receive path. After
switching a loop (internal or external via the SLIC) to the Transmit-path the return level
is measured and compared to a programmable offset value. The result of this operation
(greater or smaller than offset) can be read out via the IOM-2 interface (bit LMR in
configuration register CR2).
There is a single 8 bit Offset-Register available for all the 4 channels. This offset register
can be accessed as XR4 with a XOP-Command (Field LSEL = 100)
This register contains the 2’s complement offset value for the level metering function.
Bit
7
6
5
4
3
2
1
0
OF7
OF6
OF5
OF4
OF3
OF2
OF1
OF0
Semiconductor Group
80
02.97