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參數(shù)資料
| 型號： | 73K224L-IH |
| 廠商： | TDK Corporation |
| 英文描述： | V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem |
| 中文描述： | V.22bis/V.22/V.21 /貝爾212A/Bell 103單芯片調(diào)制解調(diào)器 |
| 文件頁數(shù)： | 3/32頁 |
| 文件大?。?/td> | 206K |
| 代理商： | 73K224L-IH |
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73K224L
V.22bis/V.22/V.21/Bell 212A/Bell 103
Single-Chip Modem
3
synchronous operation as selected. Received data is
processed in a similar fashion except that the rate
converter now acts to reinsert any deleted stop bits
and output data to the terminal at no greater than the
bit rate plus 1%. An incoming break signal (low
through two characters) will be passed through without
incorrectly inserting a stop bit.
The SYNC/ASYNC converter also has an extended
Overspeed mode which allows selection of an output
overspeed range of either +1% or +2.3%. In the
extended Overspeed mode, stop bits are output at 7/8
the normal width.
Both the SYNC/ASYNC rate converter and the data
descrambler are automatically bypassed in the FSK
modes.
SYNCHRONOUS MODE
Synchronous operation is possible only in the QAM or
DPSK modes. Operation is similar to that of the
Asynchronous mode except that data must be
synchronized to a provided clock and no variation in
data transfer rate is allowable. Serial input data
appearing at TXD must be valid on the rising edge of
TXCLK.
TXCLK is an internally derived 1200 or 2400 Hz signal
in Internal mode and is connected internally to the
RXCLK pin in Slave mode. Receive data at the RXD
pin is clocked out on the falling edge of RXCLK. The
asynch/synch
converter
Synchronous mode is selected and data is transmitted
at the same rate as it is input.
is
bypassed
when
PARALLEL BUS INTERFACE
Eight 8-bit registers are provided for control, option
select, and status monitoring. These registers are
addressed
with
the
AD0,
multiplexed address lines (latched by ALE) and
appear to a control microprocessor as seven
consecutive
memory
registers are read/write memory. The detect and
ID registers are read only and cannot be modified
except
by
modem
response
parameters.
AD1,
and
AD2
locations.
Six
control
to
monitored
SERIAL CONTROL MODE
The serial Command mode allows access to the
73K224 control and status registers via a serial
control port. In this mode the AD0, AD1, and AD2
lines provide register addresses for data passed
through AD7 (DATA) pin under control of the
RD
and
WR
lines. A read operation is initiated when
the
RD
line is taken low. The next eight cycles of
EXCLK will then transfer out eight bits of the
selected address location LSB first. A write takes
place by shifting in eight bits of data LSB first for
eight consecutive cycles of EXCLK.
WR
is then
pulsed low and data transfer into the selected
register occurs on the rising edge of
WR
.
DTMF GENERATOR
The DTMF generator controls the sending of the
sixteen standard DTMF tone pairs. The tone pair
sent is determined by selecting TRANSMIT DTMF
(bit D4) and the 4 DTMF bits (D0-D3) of the TONE
register. Transmission of DTMF tones from TXA is
gated by the TRANSMIT ENABLE bit of CR0 (bit
D1) as with all other analog signals.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 73K224L-IP | V.22bis/V.22/V.21/ Bell 212A/Bell 103 Single-Chip Modem |
| 73K321L-IH | CCITT V.23, V.21 Single-Chip Modem |
| 73K321L-IP | CCITT V.23, V.21 Single-Chip Modem |
| 73K321L | Miniature Switch, High Precision |
| 73K322L-IH | CCITT V.23, V.22, V.21 Single-Chip Modem |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 73K224L-IH/F | 功能描述:電信集成電路 Single Chip Modem w/Integrated Hybrid RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| 73K224L-IHR/F | 功能描述:電信集成電路 Single Chip Modem w/Integrated Hybrid RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| 73K224L-IP | 功能描述:電信集成電路 RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| 73K224L-IP/F | 功能描述:電信集成電路 RoHS:否 制造商:STMicroelectronics 類型:Telecom IC - Various 工作電源電壓:4.75 V to 5.25 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PQFP-100 封裝:Tray |
| 73K244L-IP | 制造商:TDK 功能描述:Single Chip Modem |
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