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參數(shù)資料
| 型號： | KS16121 |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | DSP for Digital Answering Phone(用于數(shù)字應(yīng)答電話的DSP) |
| 中文描述： | DSP的數(shù)字應(yīng)答電話（用于數(shù)字應(yīng)答電話的數(shù)字信號處理器） |
| 文件頁數(shù)： | 24/30頁 |
| 文件大?。?/td> | 147K |
| 代理商： | KS16121 |
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Preliminary
DSP for Digital Answering phone with FLASH interface
KS16121
INITIALIZATION
The KS16121 should be initialized when AI bit is 0 in the status word after RESET procedure or an obnormal
condition has occurred with IDLE status because of the flash write/erase failure. Otherwise, the KS16121 need
not be initialized.
When an initialization is needed, the FI (Format or initial) bit should be set properly. A new formatting (FI=1) of
flash memories is required when the FN bit is 1 in the status word after RESET procedure or an abnormal
stopping has occurred due to the flash write / erase failure. Otherwise, the FI bit should be set to 0.
When the host initializes the KS16121 with FI bit set to 1, the FT (Format Type) bit should be set properly. If
voice prompt data resides in flash memories, the FI bit shoud be 0 and the KS16121 retains the pre-stored
voice prompt data in the flash memories. Otherwise, the KS16121 clears all the data area in the flash memor-
ies including voice prompt data and including message data.
When the host issues an initialization command, the KS16121 initializes the message memory sapce ( Flash
memory) and returns the result to the host. The host specifies the total amount of available memory space in
parameter field, RAMO, in unit of 4M bits while the type of flash memory ( 4 Mor 16M ) is selected automatic-
ally by KS16121.
When formatting, after decision of flash memory type, the KS16121 checks the available memory space
exhaustively for faulty bits which may occur due to continuous use of flash memory, creating a table of usable
complete the initialization depends on the memory size and is approximately 3 sec / 4 Mbits.
The KS16121 returns to the IDLE mode at the completion.
The status field RAMO returns the actual size of memory for recording in unit of 1M bits.
When the flash write / erase failure occurs, the KS16121 returns to the IDLE mode after issuing IDLE status.
The host can detect the flash write / erase failure occurrence by monitoring the status word. In this case, the
host may reinitialize the KS16121 by issuing initialization command with FI bit being set, but all exisitng
ICMs will be erased.
RECORD
The message recording starts with the R0 instruction. The host may specify the following options with the
instruction :
Voice Activation ( VA )
-- The recording starts only after voice signal is detected. The KS16121 status
recording immediately without this option.
Silence Compaction ( SC )
-- The silence gaps during recording are detected and compacted to save
the memory.
Loop Back ( LB )
-- The in-coming voice signal is looped back to the codec input.
Once the KS16121 is in the RECORD mode, the host may issue the following instructions to the KS16121 :
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