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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)： | 18/117頁(yè) |
| 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
18
EXT TONE
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
INDEX
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1-E
F
DTMF CODE
No Tone
1
2
3
4
5
6
7
8
9
*
0
#
A
B
C
D
Reserved
CAS
In Line Monitoring mode, the input signal is “Looped
Back” and transmitted through the output of the
CODEC. This can be used for call screening or other
purposes. If the “Loop Back” is not necessary, the
HOST can disable this function by setting the “LB DIS”
bit (bit 5) in the first Line Monitor command to “1”.
While in Line Monitoring mode the D6571E allows
control of the Volume level of the looped backed signal
without interrupting the Line Monitor Mode. The
volume can be controlled in 2 dB steps from +16 dB
down to -42 dB and also includes Mute. While in the
Line Monitoring mode the Host may change
independently the DTMF, VOX, CPT, and CAS
Sensitivity without interrupting the Line Monitoring
mode. The status returned for the Volume control or
Sensitivity control command will be the status of the
Line Monitoring mode. Therefore, the line monitoring
function will not be interrupted. The D6571E will stop
monitoring the line and return to Idle mode when an Idle
command is sent.
The Detector Configuration command (submode of the
Initialization mode) defines if the D6571E will report
detection of the A, B, C, D digits. By default the D6571E
reports 12 digits only ( indexes 1 - C).
The Line Monitor mode has the same performance in
case of “cold” and “warm start.”
CID Submode
To monitor for CID information, Line Monitor command
should be sent with CID bit (bit 10) set. The D6571E will
return an ASCII code of the detected character in the
low byte of the status word. MS bit of the ASCII byte
will be sent in bit 7 of the status word. LS bit of the
ASCII byte will be sent in the bit 0 of the status word.
If no Seizure Signal is expected to be detected (off-hook
detection) the NS bit (bit 8) should be set in the CID
command.
CID command should be sent repeatedly until the entire
CID message is received. In average 3 command/status
will be transmitted per frame.
If no character is detected the D6571E will return status
with bit ND (bit 8) set and zero in low byte. In case of
no detection the status will be returned once each frame.
CID mode performance is the same in case of “cold” and
“warm start.”
Delete Message
In this mode the D6571E performs one of the following
functions:
1. If the Garbage Collection bit (bit 11) is 0, the D6571E
removes the message entry specified in bits 0-6
from the message directory, shifts all higher
message entries one place down in the directory
and decreases the total number of messages by one.
Deletion of a message will not free up memory
space until a Garbage Collection command is
performed. The Garbage Collection Recommended
bit, in the status word of the READ MEMORY
STATUS command, will be set after message
deletion.
2. If the Garbage Collection bit is 1, the D6571E
performs Garbage Collection to free memory space
by erasing sectors. The Garbage Collection erases
one sector per command. After erasing the last
sector, the D6571E returns the status 8880H. The
Garbage Collection Recommended bit, in the status
word of the READ MEMORY STATUS command,
will be reset after erasing the last sector.
Note:
1) The D6571E returns Garbage Collection status
automatically after each release of RESET signal from
the chip. In the case of “cold start” ,bit 0 will be set (1).
In the case of “warm start”, bit 0 will be reset (0).
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