PEB2465 SIEMENS [Siemens Semiconductor Group], PEB2465 Datasheet - Page 41

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

4
The signaling connection between SICOFI-4 and a SLIC is performed by the SICOFI-4
command/indication pins. Data received from the downstream C/I byte are inverted and
transferred to command output pins (SB, SO). Data on input pins (SI, SB) are inverted
and transferred to the upstream C/I-byte.
4.1
The SICOFI-4 offers a 8 pin parallel command/indication SLIC interface per channel
Indication input pins:
Command output pins:
Program. command/indication pins: SBx_0, SBx_1 (with x: 1
Data present at SIx_0, SIx_1, SIx_2 and SBx_0, SBx_1 (if programmed as input) are
sampled, inverted and transferred upstream. Data received downstream from IOM-2
interface are latched, inverted and fed to SOx_0, SOx_1, SOx_2 and SBx_0, SBx_1 (if
output).
4.2
The IOM-2 channel contains 6 bits (for two voice channels) in both directions for analog
devices like the SICOFI-4. As the SICOFI-4 has up to five command output pins per
channel (depending on XR3) it is not possible to send commands to all pins at a time.
So C/I-channel bit 5 is used as an address bit to select the channel for the command
data on C/I-channel bits 4
General Case:
Bit
Example for SICOFI-4 channels 1 and 2 (IOM-2 timeslot 0):
4.3
Bit
Bit
1)
Semiconductor Group
If SBx_y is programmed as command output.
5
5
5
SLIC Interface
IOM
Data-downstream C/I Channel Byte Format (receive)
Data Upstream C/I Channel Byte Format (transmit)
AD
1
0
®
-2 Interface Command/Indication Byte
4
4
4
SB1_1
SB2_1
SBx_1
1)
1)
0.
3
3
3
SB1_0
SB2_0
SBx_0
SIx_0, SIx_1 SIx_2
SOx_0, SOx_1, SOx_2
1)
1)
41
2
2
2
SOx_2
SO1_2
SO2_2
1
1
1
SO1_1
SO2_1
SOx_1
4)
SLIC Interface
0
0
0
PEB 2465
SO1_0
SO2_0
SOx_0
02.97