Part # User Manual STLC3075 UM0271 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: valuation board with STLC3075 SLIC for W


Part Details:

UM0271 User manual Evaluation board with STLC3075 SLIC for WLL Abstract This document is a simple user manual of the STLC3075 evaluation board, it is not a description of the device functionalities. This description is available in the STLC3075 data sheet and Application note (AN2132) documents. July 2006 Rev 1 1/8 www.st.com Contents UM0271 Contents 1 STLC3075 Evaluation board description . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Transition between Ringing and Active mode . . . . . . . . . . . . . . . . . . . . . . 4 1.2 Fly-Back or Buck-Boost configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2/7 UM0271 STLC3075 Evaluation board description 1 STLC3075 Evaluation board description The board is provided of a set of external connectors that permits to test all the functionalities of the STLC3075 chip. In Figure 1 is shown the placement of the external connectors and components inside the board. Following the description of these connectors. VPOS is the positive supplier voltage provided to the SLIC. SYST-GND is the ground of the board. VBAT and VBAT/DC-DC are two outputs and they must be connected together by means a short circuit. They allow to monitor the VBAT behavior. TIP and RING are the 2W local loop port. RX and TX are the 4W port (TX output, RX input) D0/TTX is a control bit (used for ringing and TTX injection) D2/RINGER is used to generate the ringing signal: it is a square wave input (from 20Hz to 50Hz) CKTTX is the metering pulse clock input (12 or 16 KHz square wave). CLK/DC-DC is the 125KHz clock input for the DC-DC converter.External CLK will arrive on the CLK pin connecting by the bridge EXTCK point with CLK. Using this type of connection (EXTCK with CLK) and no external CLK signal (125KHz) is present, the DC-DC converter goes in turn-off condition. Instead connecting the CLK with CVCC, it will be possible to operate in autoscillation mode (the board is usually set in this configuration). Switches D0, D1, D2, PD, GAIN SET are used to select the operating mode of the device. 3/8 Document Outline


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