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| 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)： | 19/117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
19
2) In case of “cold start” neither Delete nor Garbage
Collection command is being performed. Both
commands return Idle status.
Erase Flash
The D6571E allows to erase the entire flash (with the
exception of the bad block table). To perform erase
operation the ERASE commands should be sent twice.
After sending the second command the contents of the
flash including Voice Prompt will be erased. This
command can be used on the development stage to
clean used flash. This command is not recommended to
be used in actual applications.
The ERASE command must not be used with the flash
that has not been initialized yet
.
The Erase command performs in the same way in case of
“cold” and “warm start.”
Set/Modify Time Stamp
In this mode, the Host sends the D6571E the data that
will be attached to the next recorded message. Up to 2
words (4 bytes) may be attached to each message.
Usually the Host sends the D6571E the current time and
date mark that will be used for time and date stamping of
the messages. Time stamp or any other data stored in
these two words can be retrieved by Get Time Stamp
command. The D6571E automatically returns to the Idle
mode after this command.
Any bit of the Time Stamp can be modified from “1” to
“0” by the Modify Time Stamp command after message
has been recorded. No modification from “0” to “1” is
available. Therefore it is recommended that all non used
bits will be set to “1” by Set Time Stamp command.
This command is not available in case of “cold start”.
The D6571E will return Idle status.
Get Time Stamp
In this mode the D6571E sends the Host the data that
was attached to the recorded message. Usually this will
be the current time and date. The D6571E automatically
returns to the Idle mode after the Set Current Time
command.
This command is not available in case of “cold start”.
The D6571E will return Idle status.
Get Available Record Time
In this mode, the D6571E sends the HOST the minimum
available Flash memory record time in units of memory.
Time representation of the units depends on the
compression rate to be used.
The D6571E automatically returns to the Idle mode after
this command. The D6571E will return Idle status in
case of “cold start.”
Self Test and Initialization
In this mode the D6571E performs memory configuration,
mapping, and testing, initialization of the system
parameters as well as various selections related to the
CODEC interfaces, data storages, signal detectors, etc.
This mode allows also Volume Control and Sensitivity
Control of DTMF, VOX, CAS, and CPT detectors.
1) Flash Initialization (Test Mode = 0001)
This command initializes the flash memory.
This
command may be used immediately after the Flash
Hardware Selection command.
Flash memory can not be addressed in functional modes
before it is initialized. This command destroys the
contents of the memory except the Voice Prompt blocks
and bad block table.
Initialization is necessary to activate external VP ROM
even if no flash is installed in the system.
2) Flash Fast Test (Test Mode = 0011)
This command is not needed for normal operation. It
can be used to confirm the flash configuration. It gives
a fast indication that the memory devices are installed
and functional. This command can only be used after a
Flash Hardware Selection command. It destroys the
contents of the memory except the Voice Prompt blocks
and bad block table.
Flash must be initialized after using Flash Fast Test
command
.
3) Flash Hardware Selection (Test Mode = 0101)
The Host must send this command to the D6571E in
order to initialize and map the system memory. This
command be issued first, because Flash Fast Test and
Flash Initialization command should follow Flash
Hardware Selection command. Neither Flash Fast Test
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