W6691CD中文資料華邦電子數(shù)據(jù)手冊(cè)PDF規(guī)格書(shū)

GENERAL DESCRIPTION

W6691 consists of one D channel HDLC controller and two B HDLC controller channel access. The HDLC controller facilitates efficient access to signaling, data and voice services. It provides multiplex/non- mutiplexe 8- bit microprocessor interface. The interface is selected by external MBS selection. In addition, W6691 can be operated in TE, LT-S and LT-T mode programmed by external pin. In TE mode, W6691 provides PCM bus or GCI bus to connect with CODEC. In LT mode, it can used in NT2 application.

FEATURES

? Full Duplex 2B+D S/T interface transceiver compliant with ITU I.430 Recommendation

? One D channel HDLC controller

- Maskable address recognition

- Transparent (HDLC) mode

- FIFO buffer (2 * 64)

? Two B channel HDLC controller

- Maskable address recognition

- Transparent (HDLC) mode

- FIFO buffer (2 * 128)

? Various B channel switching capabilities and PCM intercom

? Two PCM CODEC interfaces for speech and POTS application

? GCI interface connects with other peripheral device in TE, LT-S and LT-T mode.

? Multi-frame synchronization

? 8-bits Intel mode or Motorola mode interface accesses B channel and Command/Indication channel.

? The timing clock recovery depends on operating mode.

? DPLL circuit designed in chip for NT2 application.

? Four kind of the extended interrupt trigger mode.

? Two kind of output interrupt polarity selection can be programmed.(Positive level and negative Level)

? Added reset signal to reset other chip.

? Loop back function for testing.

? Layer1 Activate Indication Output can be connected to LED

? Two of programmable timer

? 3.3 Volt power supply

? 3.3 Volt output; Maximum Input is 5.0Volt

? Advanced CMOS technology

? 64 pin LQFP or 68 pin PLCC package