參數(shù)資料
型號(hào)： NSAM266SA
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 數(shù)字信號(hào)處理
英文描述： 4 Mbit Uniform Sector, Serial Flash Memory
中文描述： 8-BIT, MIXED DSP
文件頁數(shù)： 45/52頁
文件大?。?/td> 571K
代理商： NSAM266SA
2.0 Software
(Continued)
TABLE 2-2. Tunable Parameters
(Continued)
Index
Parameter Name
Description
Default
27
DTMFDTWISTDLEVEL
A one-byte value that controls the twist level of a DTMF tone, generated by the GT
command, by controlling the energy level of each of the two tones (low frequency and
high frequency) composing the DTMF tone. The Least Significant Nibble (LSN)
controls the low tone and the Most Significant Nibble (MSN) controls the high tone.
The energy level of each tone, as measured at the output of a TP3054 codec (before
the DAA) connected to the CompactSPEECH is summarized in the following table:
66
Nibble Value
0
1
2
3
4
5
6
7
8–15
Tone energy (dB-Volts)
0
b
17.8
b
14.3
b
12.9
b
12.4
b
12.0
b
11.9
b
11.85
b
11.85
The volume of the generated DTMF tone during meaurements was 6
(TONEDGENERATIONDLEVEL
a
VOLDLEVEL
e
6).
For the default level, the high tone is
b
14.3 dBV and the low tone is
b
12.4 dBV,
which gives a DTMF twist level of 1.9 dB.
The energy level of a single generated tone is the level of the low tone.
28
Reserved
29
Reserved
Example
TUNE 23 700
Byte sequence:
Microcontroller
15 17 02 BC
CompactSPEECH 15 17 02 BC
Description:
Set the minimum period for busy
detection to seven seconds.
VC
Volume ControlvolDlevel
Controls the energy level of all the output generators (play-
back, tone generation, and voice synthesis), with one com-
mand. The resolution is
g
3 dB.
The actual output level is composed of the tunable level
variable, plus the volDlevel. The valid range for the actual
output level of each output generator is defined in Table 2-2.
For example, if the tunable variable VCDDLEVEL is 6, and
volDlevel is
b
2, then the output level equals VCDDLEVEL
a
volDlevel
e
4.
Example
VC 04
Byte sequence:
Microcontroller
28 04
CompactSPEECH 28 04
Description:
Set the volume level to VCDDLEVEL
a
4.
WRAM
Write Memorytag, data
This command creates a new message with a message tag
tag. The following 32 bytes of data data are stored as the
new message data in the message memory.
The WRAM command switches the CompactSPEECH to
the
MEMORYDWRITE
state. As long as it remains in this
state, each subsequent WMEM command appends new
message data to the end of the previous data. The
CompactSPEECH remains in the
MEMORYDWRITE
state
until an S command is issued. Note that, while the Compact-
SPEECH is in the
MEMORYDWRITE
state, tag is ignored.
If
the
memory
becomes
EVDMEMFULL is set in the status word.
Example
full,
recording
stops
and
WMEM 132 bytes
Byte sequence:
Microcontroller
17 01
32 bytes of
data to write
CompactSPEECH 17 01
echo 32 bytes
of data
Description:
Create a message with tag
e
01, and
write 32 bytes in the message memory.
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