參數(shù)資料
型號: PEB2466-HV1.2
廠商: SIEMENS A G
元件分類: 編解碼器
英文描述: Four Channel Codec Filter with PCM- and m-Controller Interface SICOFI4-mC
中文描述: A/MU-LAW, PCM CODEC, PQFP64
文件頁數(shù): 79/82頁
文件大小: 3330K
代理商: PEB2466-HV1.2
PEB 2466
Appendix
Semiconductor Group
79
02.97
7.2
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:
Table 2
Frequency
Command
Byte 1
697 Hz
0C/0D
1)
0A
800 Hz
0C/0D
1)
12
950 Hz
0C/0D
1)
1C
1008 Hz
0C/0D
1)
1A
2000 Hz
0C/0D
1)
00
Programming the SICOFI
-4-
μ
C Tone Generators
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.
1)
0C is used for programming Tone Generator 1, in channel 1
0D is used for programming Tone Generator 2, in channel 1
Byte 2
33
D6
F0
AE
80
Byte 3
5A
5A
5C
57
50
Byte 4
2C
C0
C0
70
09
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