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參數(shù)資料
| 型號： | Z0220122VSCR3470 |
| 英文描述： | 64Mb Q-Flash - OBSOLETE |
| 中文描述： | 通信集成電路 |
| 文件頁數(shù)： | 29/48頁 |
| 文件大?。?/td> | 1331K |
| 代理商： | Z0220122VSCR3470 |
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Z02202
ZiLOG
V.22bis Data Pump with Integrated AFE
PS000902-0501
Z02201
29
DTMFh_lev
01A1
DTMFl_lev
01A0
–
6 dBm
–
9 dBm
DTMF Transmit Level
—
High Band
DTMF Transmit Level
—
Low Band
These are the transmit levels for the DTMF low band (DTMFl_lev) and DTMF
high band (DTMFh_lev) frequencies. The levels are set by the following
formula where lev is specified in dBm and less or equal to 0:
10
lev
=
Change in value takes effect in 0.1 msec. The data pump sets these locations
to their default values at any reset.
Tone Generator A
Tone Generator B
The data pump has two independent tone generators, each simultaneously
generating a pure tone with its own transmit level when Config register,
bits 0
–
6 (MODE) is 1 (transmit tones). The outputs of the tone generators
are mixed together. The generated frequencies are set by writing a
coefficient to location ToneGenA or ToneGenB. The coefficient is defined
as the following :where f is the frequency of the tone to be generated:
2
π
f
9600
ToneGenA
0191
ToneGenB
0196
—
—
The transmit levels for tone generators A and B are set in locations
DTMFl_lev and DTMFh_lev, respectively. See
“
Transmitting Tones
”
for
more information including a description of setting the tone transmission
levels.
Transmit Power Level
To sets the transmit power level, use the following formula where power
is speci
fi
ed in dBm and less than or equal to
–
6:
TxLevel
0185
–
10 dBm
Change in value takes effect at the end of the baud period.
Dial Timer Inter-Pulse Count
See Seq1Count
Dial Timer Off Count
See Seq1count
Dial Timer On Count
Seq1Count, Seq2Count, and Seq3Count are timer counts in units of
1/9600 of a second, for DTMF and pulse dialing.
For DTMF dialing, Seq1Count is the length of the digit on-time, and
Seq2Count is the length of the digit off-time.
For pulse dialing, Seq1Count is the length of the break period,
Seq2Count is the length of the make period, and Seq3Count is the length
of the pause after dialing a digit.
The data pump sets these locations to their default values when the host
sets Con
fi
g register, bits 0
–
6 (MODE) to 3 (dial).
Seq3Count
18E
Seq2Count
18D
Seq1Count
18C
None
95 msec
95 msec
Table 15. Modem Data Pump Word De
fi
nitions (Continued)
Register & Address
(hex)
Default
Value
Function and Explanation
DTMFlev
(
)
20
32767
coeffx
------------4096
=
TxLevel
10
power
(
)
20
2048
=
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