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參數(shù)資料
| 型號： | MT88L89AC |
| 廠商： | Mitel Networks Corporation |
| 英文描述： | 3V Integrated DTMFTransceiver with Adaptive Micro Interface |
| 中文描述： | 3V的綜合DTMFTransceiver自適應(yīng)微型接口 |
| 文件頁數(shù)： | 10/20頁 |
| 文件大?。?/td> | 352K |
| 代理商： | MT88L89AC |
MT88L89
Advance Information
4-134
Table 3. Internal Register Functions
Table 4. CRA Bit Positions
Table 5. CRB Bit Positions
Motorola
Intel
RS0
R/W
WR
RD
FUNCTION
0
0
0
1
Write to Transmit
Data Register
0
1
1
0
Read from Receive
Data Register
1
0
0
1
Write to Control Register
1
1
1
0
Read from Status Register
b3
b2
b1
b0
RSEL
IRQ
CP/DTMF
TOUT
b3
b2
b1
b0
C/R
S/D
TEST
BURST
ENABLE
Table 6. Control Register A Description
BIT
NAME
DESCRIPTION
b0
TOUT
Tone Output Control. A logic high enables the tone output; a logic low turns the tone output
off. This bit controls all transmit tone functions.
CP/DTMF
Call Progress or DTMF Mode Select. A logic high enables the receive call progress mode;
a logic low enables DTMF mode. In DTMF mode the device is capable of receiving and
transmitting DTMF signals. In CP mode a retangular wave representation of the received
tone signal will be present on the IRQ/CP output pin if IRQ has been enabled (control
register A, b2=1). In order to be detected, CP signals must be within the bandwidth
specified in the AC Electrical Characteristics for Call Progress.
Note: DTMF signals cannot be detected when CP mode is selected.
b1
b2
IRQ
Interrupt Enable. A logic high enables the interrupt function; a logic low de-activates the
interrupt function. When IRQ is enabled and DTMF mode is selected (control register A,
b1=0), the IRQ/CP output pin will go low when either 1) a valid DTMF signal has been
received for a valid guard time duration, or 2) the transmitter is ready for more data (burst
mode only).
b3
RSEL
Register Select. A logic high selects control register B for the next write cycle to the
control register address. After writing to control register B, the following control register
write cycle will be directed to control register A.
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相關(guān)代理商/技術(shù)參數(shù) |
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| MT88L89AP | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:3V Integrated DTMFTransceiver with Adaptive Micro Interface |
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