전자부품 데이터시트 검색엔진 |
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ST70134 데이터시트(PDF) 5 Page - STMicroelectronics |
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ST70134 데이터시트(HTML) 5 Page - STMicroelectronics |
5 / 8 page ST70134 - ST70135A 5/8 ADSL Modem control software The ADSL transceiver is based on a programmable DMT modem (ST70135A) whose configuration is loaded by an external controller. Additionally to the control functions, STMicro- electronics provides the DMT modem software. The software is written in C++ language, and is designed to be portable to any processor. The driver has to be interfaced with a real time OS kernel, it is compatible with any standard product available on the market. The kernel manages the tasks dedicated to modem software. The modem Software core comes with two software modules: Board Support Package (BSP) and Application Programming Interface (API). BSP manages the hardware dependent features (i.e. interrupts, peripheral mapping). APIs interface to the higher level application software and to the OS. ADSL Loop performances The hereafter tables show the performances that a system, which houses ASCOT, can achieve for ANSI and ETSI loops. The following results refer to an end-to end ADSL equipment with no external disturbance. ANSI Loop (26awg) ETSI Loop (Loop 2, noise model A) Figure 4 : Software Architecture USER HIGH LEVEL SOFTWARE ADSL MANAGEMENT APPL ICATION SW OS INTERFACE MODEM SW BOARD SUPPORT PACKAGE ADSL HARDWARE Length Downstream Upstream 9Kft 7.47 E +0.6 1.05 E +06 12Kft 3.69 E +0.6 9.37 E +05 15Kft 1.56 E +0.6 7.25 E +05 Length Downstream Upstream 2Km 8.00 E +0.6 8.32 E +05 4Km 4.07 E +0.6 6.72 E +05 5Km 1.70 E +0.6 4.72 E +05 |
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