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參數(shù)資料
| 型號(hào)： | D6571E |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Chip for an All-Digital Telephone Answering Machine with Flash Memory Interface |
| 中文描述： | 芯片的全數(shù)字電話應(yīng)答機(jī)與快閃記憶體介面 |
| 文件頁(yè)數(shù)： | 98/117頁(yè) |
| 文件大?。?/td> | 551K |
| 代理商： | D6571E |
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D6571E Data Sheet
DS6571E.2
DSP GROUP, INC., 3120 SCOTT BOULEVARD
SANTA CLARA, CA 95054 PH: 408 986-4300 FAX: 408 986-4490
94
TrueSpeech Data Pump:
For compressed data, the Host sends the high byte of the command word (Data Transfer command) to the D6571E. The
D6571E responds with compressed data in the high byte of the status (Data Transfer status). During the data transfer
phase, the HI\LO pin (pin 4) should be set to high.
Data Transfer Command:
(DC1 . . . DC_Transfer_Number_of_Bytes for TrueSpeech Data Pump)
0 0 0 1
0 0 0 0
(15 - 12) (11 - 8)
Data Transfer Status:
(DS1 . . . DS_Transfer_Number_of_Bytes for TrueSpeech Data Pump)
DATA BYTE
(15 - 8)
m
-law/A-law PCM Data Pump
:
For
μ
-law/A-law PCM data, the Host sends the high byte of the command word (Data Transfer command) to the D6571E.
The D6571E responds with a word of the
μ
-law/A-law data in the status word (Data Transfer status).
Data Transfer Command:
(DC1 . . . DC_120 for
μ
-law/A-law PCM Data Pump)
0 0 0 1
0 0 0 0
(15 - 12) (11 - 8)
Data Transfer Status:
(DS1 . . . DS_120 for
μ
-law/A-law PCM Data Pump)
DATA WORD
(15 - 0)
For both TrueSpeech and
μ
-law/A-law Data Pumps, in each frame the Host issues command C2, reads status S2, then
issues command C3. Status S3 will be sent to the Host after the D6571E completes compression of the current frame. The
actual data transfer starts after S3 is received by the Host. After data transfer is completed the Host should issue the next
C2 command. The D6571E checks bits 15 -12 in the C1, C2, and C3 commands for the correct code. If an incorrect code is
detected, the D6571E will return to Idle mode.
NOTE:
Instead of sending the Data Pump C2 command as shown above, the Host can send a Set Volume Level command
to set the volume level. The D6571E will respond with Data Pump Status S2 as if ‘continue record’ command was
executed. The ‘Set Volume C2 Command’ and status S2 are shown below.
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