PEB2465 SIEMENS [Siemens Semiconductor Group], PEB2465 Datasheet - Page 45

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

Table 5
CR1
XR1
Coefficient RAM
Command Stack
DD-input
DU-output
V
SBx_y
SOx_y
If any voltage is applied to any input-pin before initial application of
may not enter the basic setting mode. In this case it is necessary to reset the SICOFI-4
or to initialize the SICOFI-4 configuration registers to ‘0’.
The SICOFI-4 leaves this mode automatically with the beginning of the next 8 kHz frame
(RESET-pin is released).
5.2
After releasing the RESET-pin, (RESET-state), beginning with the next 8 kHz frame, the
SICOFI-4 will enter the Standby mode. The SICOFI-4 is forced to standby mode with the
PWRUP bit set to ‘0’ in the SOP command (POWERDOWN). All 4 channels must be
programmed separately. During standby mode the serial SICOFI-4 IOM-2 interface is
ready to receive and transmit commands and data. Received voice data on DD-pin will
be ignored. SICOFI-4 configuration registers and coefficient ram can be loaded and read
back in this mode. Data downstream C/I-channel data is fed to appropriate Command
pins. Data on indication pins is transmitted Data upstream.
Table 6
IOM-2 Voice Channels
V
5.3
The operating mode for any of the four channels is entered upon recognition of a
PWRUP bit set to ‘1’ in a SOP command for the specific channel.
Semiconductor Group
OUT1, 2, 3, 4
OUT1, 2, 3, 4
XR4
Standby Mode
Operating Mode
CR4
45
00 Hex
00 Hex
not defined
cleared
ignored
high impedance
GNDA1, 2, 3, 4
Input
GNDD
‘11111111’ (idle)
GNDA1, 2, 3, 4
Operating Modes
V
DD
, the SICOFI-4
PEB 2465
02.97