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參數資料
| 型號： | KS16121 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | DSP for Digital Answering Phone(用于數字應答電話的DSP) |
| 中文描述： | DSP的數字應答電話（用于數字應答電話的數字信號處理器） |
| 文件頁數： | 26/30頁 |
| 文件大?。?/td> | 147K |
| 代理商： | KS16121 |
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Preliminary
DSP for Digital Answering phone with FLASH interface
KS16121
Once in the VOICE PROMPT mode, the host can issue the V1 instruction to monitor the status of the
playback phrase ( RD, EM ) and the DTMF / call progress tone detection result ( DTMF, CPT ) without
interrupting the playback.
The KS16121 sets the status bit , RD ( ready ), when it reaches near the end of the phrase. A new V0
instruction with an appropriate phrase number may be issued to play another phrase. The host can play two
phrases without any gap between them by issuing a V0 instruction immediately after RD is set.
Alternatively, the host may create a silence gap between phrases by delaying the instruction. Note that
the KS16121 returns a status word every 20 msec period. ( For instance, a 40 msec gap is created by a
command sequence, V1 , V1 and V0, immediately after RD has been set ).
The KS16121 sets the status bit EM when it actually reaches the end of a phrase.
The VOICE PROMPT mode terminates with an idle instruction from the host.
TONE GENERATION
A tone signal is generated and sent to the codec in this mode. The tone is selected from the tone table
that contains 31 tone definitions. Each tone may have two frequency components with gains respectively.
Refer to the PROGRAMMING mode for their definitions.
The KS16121 enters the TONE GENERATION mode with a tone generate instruction that specifies the tone
index ( TONE ID ) and master gain ( MGAIN ). The actual gains of individual frequency components are
determined by MGAIN + GAIN0 and MGAIN + GAIN1. These sums specify the tone gains, ranging from
24dBm to 6 dBm in 2 dB steps and hence must not exceed 15. Here 0 dBm is equivalent to the power of a
sinusiod with a peak to peak amplitude of 7175 before a linear to
μ
-law conversion.
In the TONE GENERATION mode, the host may switch to the different tone signal by sending a new tone
generate commmand with the appropriate TONE ID and MGAIN. The DTMF and call progress tone detection
result may be monitored, without interrupting the tone generation, by issuing a tone generate command with
the same tone parameters.
The TONE GENERATION mode terminates with an idle command.
MESSAGE DELETION
In this mode, the KS16121 removes the message specified in the MESSAGE ID field of the instruction and
returns to the idle mode. The status bit , EF, indicates an invalid message index, if set.
GARBAGE COLLECTION
In this mode, the KS16121 moves one message below the empty holes in the memorry space. A status word
is returned after each move to inform the host whether the messages have been moved or not. When all the
messages have been moved, the KS16121 issues a status word with GC bit set to 1.
The time it takes to complete a garbage collection varies depending on the size of memory and the number
of messages stored.
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