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
文件頁數(shù): 109/117頁
文件大小: 551K
代理商: D6571E
D6571E Data Sheet
DS6571E.2
DSP GROUP, INC., 3120 SCOTT BOULEVARD
SANTA CLARA, CA 95054 PH: 408 986-4300 FAX: 408 986-4490
105
Command (C3):
0 0 0 1
0 0 0 0
NUMBER OF WORDS
(15 - 12) (11 - 8) (7 - 0)
NUMBER OF WORDS - Indicates the number of words that the Host expects to read from the D6571E. This
number should be set to the maximum number of words (160).
Status (S3):
0 0 0 1
0 0 0 0
TRANSFER NUMBER OF WORDS
(15 - 12) (11 - 8) (7 - 0)
TRANSFER NUMBER OF WORDS - Indicates the actual number of words that the D6571E will send to the Host. This
number should have a value 160.
After the Host receives status S3 the actual Data Transfer phase begins. The Host sends a Data Transfer command to
the Host Data Bus. After receiving this command, the D6571E responds by sending to the Host one word of
decompressed data (Data Transfer Status).
Data Transfer Command:
(DC1 . . . DC_Transfer_Number_of_Words)
0 0 0 1
0 0 0 0 0 0 0 0 0 0 0 0
(15 - 12) (11 - 0)
Data Transfer Status:
(DS1 . . . DS_Transfer_Number_of_Words)
SPEECH DATA
(15 - 0)
Each frame the Host issues command C2 and receives status S2. Upon receiving S2, the Host starts transmitting
compressed 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 decompression 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 for the correct code in bits 15-12 in each C1, C2, and C3 command. If an
incorrect code is detected, the D6571E will exit Data Pump mode and return to Idle mode.
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