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): 53/117頁
文件大?。?/td> 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
51
0110
1
0 0 0 0 0 0 0 0 0
(10 - 0)
(15 – 12)
(11)
7. LINE MONITOR
Command:
0111
0
CID
0
NO CS
0 0
LB
DIS
0 0 0 0 0
(15 - 12) (11) (10) (9) (8) (7 - 6) (5)
CID
= 0: Line Monitor Mode
= 1: CID demodulation
LB DIS
= 1: Disable loopback of input samples
= 0: Enable loopback of input samples
NO CS
= 1: CID detector does not expect Channel Seizure signal (off-hook BellCore protocol)
= 0: CID detector expects Channel Seizure signal prior message (on-hook BellCore, V.23)
If CID = 0
Status:
0111
(15 - 12)
(11 - 6)
TONE
= 1: Call progress tone detected.
DTMF } : Code of Valid DTMF signal detected.
EXT TONE }
Note:
Status is returned after recognizing the command, in each frame. Line monitoring is ended by an IDLE command.
If CID = 1
Status:
0111
000
ND
(4 - 0)
0 0 0 0 0 0
EXT
TONE
(5)
TONE
DTMF
(4) (3 - 0)
CID BYTE
(7 - 0)
(15 - 12) (11 - 9) (8)
CID BYTE :
ND
= 0:
= 1:
The Command / Status sequence should be repeated until the entire CID message is received. An average rate is 3-4
command/status sequences per frame when the CID data is being detected. If the D6571E does not detect CID information
during last full frame the D6571E will return status with ND bit set. In case of no detection the command/status rate is 1 per
frame. CID byte = 00H in case of no detection. When NO CS bit is set the D6571E performs CID detection according to the
BellCore off-hook protocol (detection of the Seizure Signal is not required), while if NO CS bit is 0 the D6571E expects
ASCII byte of a CID information.
CID Byte Detected
no CID Byte is detected (CID Byte = 00H in this case)
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