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參數資料
型號: W6690
廠商: WINBOND ELECTRONICS CORP
英文描述: ISDN S/T Interface Controller(ISDN S/T接口控制器)
中文描述: 綜合業務數字網的S / T接口控制器(綜合業務數字網S / T的接口控制器)
文件頁數: 12/76頁
文件大小: 471K
代理商: W6690
Preliminary W6690
- 12 -
6. BLOCK DIAGRAM
The block diagram of W6690 is shown in Figure 6.1
DPLL and Timing Generator
4-wire
S/T
D-channel
HDLC
Controller
B-channel
HDLC
Controller
B-channel
HDLC
Controller
PCM
Port
B-channel Switching
FIFO
FIFO
FIFO
ISA Plug and Play Circuit/
Microcontroller Interface
ISA/Microcontroller Interface
Crystal /
Oscillator
(7.68 MHz+
100ppm)
PCM-Codec
Interface
2B+D
D
Serial
Interface
Bus
(SIB)
Line
Transceiver
&
AMI/BIN
Conversion
B1
B2
Figure 6.1 W6690 System Diagram
7. FUNCTIONAL DESCRIPTIONS
7.1 Main Block Functions
The functional block diagram of W6690 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
PCM port
D channel LAPD controller
B channel HDLC controllers (x 2)
Plug and Play (PNP) circuit / Micro-processor interface
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