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參數(shù)資料
| 型號： | 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)答機與快閃記憶體介面 |
| 文件頁數(shù)： | 107/117頁 |
| 文件大小： | 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
103
Data Transfer Command:
(DC1 . . . DC_Transfer_Number_of_Words)
SPEECH DATA
(15 - 0)
Data Transfer Status:
(DS1 . . . DS_Transfer_Number_of_Words)
ECHO OF SPEECH DATA
(15 - 0)
Command (C3):
0 0 0 1
0 0 0 0
NUMBER OF BYTES
(15 - 12) (11 - 8) (7 - 0)
NUMBER OF BYTES - Indicates the number of bytes that the Host expects to read from the D6571E. In general, the Host
should set this number to the maximum number of bytes per frame (48).
Status (S3):
0 0 0 1
0 0 0 0
TRANSFER NUMBER OF BYTES
(15 - 12) (11 - 8) (7 - 0)
TRANSFER NUMBER OF BYTES - Indicates the actual number of bytes the D6571E will send to the Host.
After the Host receives status S3, the actual data transfer begins. The Host sends the high byte of the Data Transfer
command. The D6571E responds with compressed data in the high byte of the status word (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)
0 0 0 1
0 0 0 0
(15 - 12) (11 - 8)
Data Transfer Status:
(DS1 . . . DS_Transfer_Number_of_Bytes)
DATA BYTE
(15 - 8)
Each frame the Host issues command C2 and receives status S2. Upon receiving S2, the Host starts transmitting
uncompressed data to the D6571E. After data has been transferred to the D6571E the Host issues command C3. The
D6571E will accept this command and return status S3 upon completion of the compression of the current frame. Upon
receiving status S3 the Host starts data transfer from the D6571E. Then the Host issues the next command C1 to start
processing the next frame. The D6571E checks bits 15-12 in each C1, C2, and C3 command for the correct code. If an
incorrect code is detected, the D6571E will exit Data Pump mode and return to Idle mode.
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