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VR4102 Datasheet(PDF) 481 Page - NEC |
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VR4102 Datasheet(HTML) 481 Page - NEC |
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481 / 701 page  481 CHAPTER 25 HSP (MODEM INTERFACE UNIT) This chapter describes the HSP unit’s operations and register settings. 25.1 GENERAL The core of the HSP unit uses PCtel’s PCT288I chip. The main functions of the PCT288I is as follows. <1> CODEC device control and serial l parallel conversion of the CODEC transmit/receive data <2> Control of relay lines, hook lines, and other signal lines in DAA (Data Access Arrangement) block Block diagrams of HSP unit and an example of connection between the VR4102 and external agents are shown below. |
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