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參數(shù)資料
| 型號： | MSM7715 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | Multi-Function Telecommunication LSI |
| 中文描述： | 多功能通信大規(guī)模集成電路 |
| 文件頁數(shù)： | 10/21頁 |
| 文件大?。?/td> | 150K |
| 代理商： | MSM7715 |
Semiconductor
MSM7715
10/21
TIMING DIAGRAM
When DTMF is received
Figure 1 DTMF Receive Timing
t
S
: Tone time for detect
When the input signal duration is t
S
or more, receiving is normally done.
: Tone time for no detect
When the input signal duration is t
I
or less, this input signal is ignored and DT1 to
DT4 and SP is not output.
: Interdigit pause time
When there is no input signal for t
P
or more, DT1 to DT4 and SP are reset.
: Acceptable drop out time
DT1 to DT4 and SP are not reset even though a no-signal state for t
B
or less
(momentary no-signal) occurs during signal receiving. The t
B
is applicable while
the received signals are output. (SP="1")
: SP delay time
Against the DT1 to DT4 output, SP is output after a delay of t
SP
. Therefore, latch DT1
to DT4 at the rising edge of SP.
: Signal repetition time
For normal receiving, set the signal repetition time to t
C
or more.
: Output delay time (n: 1 or 2)
Against the appearance of the input signal, DT1 to DT4 are outputs after a delay of
t
G1n
.
: Output trailing edge delay time
Against the stop of the input signal, DT1 to DT4 and SP stop outputting after a delay
of t
D
.
t
I
t
P
t
B
t
SP
t
C
t
G1n
t
D
AIN signal
DT1 to 4
SP
t
C
t
S
t
P
t
I
t
G
t
D
t
SP
t
B
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