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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(jī)與快閃記憶體介面 |
| 文件頁數(shù)： | 106/117頁 |
| 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
102
Each frame the Host issues C1 and C2 commands. The actual data transfer starts after status S2 is received by the
Host. The D6571E checks bits 15-12 in each C1 and C2 command for the correct code. If an incorrect code is
detected, the D6571E will return to Idle mode. The Host should send an IDLE command to exit this mode.
5. DATA COMPRESSION (From Host to Host)
Command (C1):
1 1 1 1
0 1
MODE
0 0
GAP
0 0 0 0
(15 - 12) (11 - 10) (9 - 7) (6 - 5)
MODE:
= 000:
low bit rate
= 001:
middle bit rate
= 010:
high bit rate
= Else:
Reserved
GAP:
= 0: gap coding is disabled
= 1: gap coding is activated
Status (S1):
1 1 1 1
0 1
(4)
(3 - 0)
MODE
0 0
GAP
0 0 0 0
(15 - 12) (11 - 10) (9 - 7) (6 - 5)
Command (C2):
0 0 1 0
(4)
(3 - 0)
0 0 0 0
NUMBER OF WORDS
(15 - 12) (11 - 8) (7 - 0)
NUMBER OF WORDS - Indicates the number of words that the Host plans to transmit to the D6571E. In general, the
Host should plan to send the maximum number of words (160). The D6571E will respond by informing the Host the
actual number of words that will be accepted.
Status (S2):
0 0 1 0
0
IND
0 0
TRANSFER NUMBER OF WORDS
(15 - 12) (11) (10) (9 - 8) (7 - 0)
TRANSFER NUMBER OF WORDS - Indicates the number of words that the D6571E will accept from the Host. Should be
160 in this mode.
IND (Insufficient Data) - Indicates that the number of words that the Host is going to transmit to the D6571E is less than
necessary for compression. If this is the case, IND will be set to ‘1, TRANSMIT NUMBER OF WORDS will be set to
00000000, and the D6571E will skip the word transfer phase.
If IND is not set to ‘1’, then the Host can transmit data to the D6571E after receiving status S2. The Host will transmit the
data by sending a Data Transfer Command. The D6571E will respond with echo of this word (Data Transfer Status).
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