PEB2466 SIEMENS [Siemens Semiconductor Group], PEB2466 Datasheet - Page 79

• Manufacturer Part Number: PEB2466
• Description: Four Channel Codec Filter with PCM- and m-Controller Interface SICOFI4-mC
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

Two independent Tone Generators are available per channel. Switching on/off the Tone
Generators is done by a SOP-Command for CR1-register. The frequencies are
programmed via a COP-Command, followed by the appropriate byte-sequence.
When one or both tone-generators are switched on, the voice signal is switched off, if
V+T=0 (CR2) for the selected voice channel. To make the generated signal sufficient for
DTMF, a programmable bandpass-filter is included. The default frequency for both tone
generators is 1000 Hz. The QSICOS-program contains a program for generating
coefficients for variable frequencies.
Byte sequences for programming both the tone generators and the bandpass-filters:
800 Hz
950 Hz
1008 Hz
2000 Hz
The resulting signal amplitude can be set by transmitting the AR1 and AR2 filters. By
switching a ‘digital loop’ the generated sine-wave signal can be fed to the transmit path.
7.2
Table 2
Frequency
697 Hz
1)
Semiconductor Group
0C is used for programming Tone Generator 1, in channel 1
0D is used for programming Tone Generator 2, in channel 1
Programming the SICOFI
Command
0C/0D
0C/0D
0C/0D
0C/0D
0C/0D
1)
1)
1)
1)
1)
Byte 1
0A
12
1C
1A
00
®
-4- C Tone Generators
79
Byte 2
33
D6
F0
AE
80
Byte 3
5A
5A
5C
57
50
Byte 4
2C
C0
C0
70
09
PEB 2466
Appendix
02.97