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參數資料
型號: W6692
廠商: WINBOND ELECTRONICS CORP
元件分類: 通信及網絡
英文描述: PCI Bus ISDN S/T Interface Controller(PCI總線的ISDN S/T接口控制器)
中文描述: SPECIALTY TELECOM CIRCUIT, PQFP100
封裝: 14 X 20 MM, 2.75 MM HEIGHT, QFP-100
文件頁數: 11/84頁
文件大小: 473K
代理商: W6692
W6692
Publication Release Date: October 1998
- 11 -
Revision A1
7. FUNCTIONAL DESCRIPTIONS
7.1 Main Block Functions
The functional block diagram of W6692 is shown in Figure 6.1. The main function blocks are:
Layer 1 function according to ITU-T I.430
Serial Interface Bus (SIB)
B channel switching
supports GCI bus interface
PCM port (x 2)
D channel HDLC controller
B channel HDLC controllers (x 2)
PCI interface circuit
Peripheral control
The layer 1 function includes:
S/T bus transmitter/receiver
Timing recovery using Digital Phase Locked Loop (DPLL) circuit
Layer 1 activation/deactivation
D channel access control
Frame alignment
Multiframe synchronization
Test functions
The serial interface bus performs the multiplexing/demultiplexing of D and 2B channels.
The B channel switching determines the connection between layer1/GCI, layer 2 and PCM.
The GCI circuit is used to connect a U transceiver. In this case, the layer 1 function of S/T interface is
disabled. After power up or reset, the GCI circuit is disabled and the S/T layer 1 function is enabled.
The PCM port provides two 64 kbps clear channels to connect to PCM codec chips.
The D channel HDLC controller performs the LAPD (Link Access Procedure on the D channel)
protocol according to ITU-T I.441/Q.921 recommendation.
There are two independent B channel HDLC controllers. They can be used to support HDLC-like
protocols such as Internet PPP.
The PCI interface circuit implements PCI specification revision 2.1 slave mode function.
The peripheral control block is used to control other peripheral devices such as CODEC, POTS, LEDs
or device with microprocessor interface.
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