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參數(shù)資料
| 型號： | L2702 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | SmartACFL Modem |
| 中文描述： | SmartACFL調(diào)制解調(diào)器 |
| 文件頁數(shù)： | 8/24頁 |
| 文件大小： | 210K |
| 代理商： | L2702 |
SmartACFL
V.90/K56flex Modem Device Sets with SmartDAA Technology for Low Power Applications
8
Conexant
Doc. No. 100444A
Proprietary Information
RCDSVD Speech Codec Processor (SCP)
(Optional)
The RCDSVD SCP (R6715-14), required for on-
board DSVD operation, is packaged in a 100-pin
PQFP. The 56.448 MHz crystal frequency is
supplied by the MDP XCLK output.
MCU/MCUP Firmware
MCU/MCUP firmware performs processing of
general modem control, command sets, data
modem, error correction and data compression
(ECC), fax class 1, fax class 2, DSVD,
voice/audio/TAM/speakerphone, W-class, V.80,
analog cellular, GSM, and serial DTE/parallel
host/PC Card interface functions according to
modem models (Table 1).
Configurations of the modem firmware are provided
to support parallel host bus interface (MCU), serial
DTE interface (MCU) or PC Card interface (MCUP)
operation.
The modem firmware is provided in object code form
for the OEM to program into external ROM/flash
ROM. The modem firmware may also be provided in
source code form under a source code addendum
license agreement.
Modem Data Pump (MDP)
The Modem Data Pump (MDP) supports data/fax
modem, voice record from and playback to the
telephone line, and optional voice/full-duplex
speakerphone operation. The MDP communicates
with the MCU via parallel bus, serial data and clock,
and serial voice (optional) signals. Downloadable
architecture allows upgrading of MDP code from the
MCU.
The MDP, packaged in a 100-pin TQFP, includes a
modem controller interface, a digital signal processor
(DSP), a voice codec (VC) interface, and a
SmartDAA Interface.
The MDP performs telephone line signal
modulation/demodulation in a hardware DSP which
reduces computational load on the host processor.
Downloadable architecture allows updating of MDP
executable code.
The SmartDAA Interface communicates with, and
supplies power and clock to, the LSD through the
DIB.
The input clock frequency is 28.224 MHz and is
supplied by the MCU. The operating voltage is +3.3V
with +5V tolerant inputs.
ADPCM voice processing is supported.
Downloading of MDP code from the MCU is
supported.
Digital Isolation Barrier (DIB) (OEM Supplied)
The DIB electrically DC isolates the MDP from the
LSD. The MDP is connected to a fixed digital ground
and operates with standard CMOS logic levels. The
LSD is connected to a floating ground and can
tolerate high voltage input (compatible with
telephone line and typical surge requirements).
A digital transformer (DXFMR) in the DIB power
channel couples power and clock digital waveforms
from the MDP to the LSD.
The DIB data channel supports bidirectional half-
duplex serial transfer of data, control, and status
information between the MDP and the LSD over two
lines.
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