external registers 中文意思是什麼
external registers
解釋
外緩存器-
Qe1 achieve the whole synchronization by software and hardware. during the course of the initialization of the qe1 system, the chip pm4354 can accomplish the task of synchronization of bit, frame and multiframe after the chip initialization by the software. after pm4354 accomplishes the bit synchronization, qel will read the status registers of the pm4354 to get the status of each el circuit and choose recovered clock of the specified the el circuit as the external timing source of the whole htc - 5200an equipment
Qe1系統在系統初始化時，通過軟體完成對硬體晶元pm4354的初始化工作后，便可利用該晶元完成4路e1的同步（位同步、幀同步和復幀同步） ；在pm4354完成時鐘提取的任務后， qe1通過不斷地訪問pm4354的狀態寄存器，獲得每路e1的狀態信息，在時鐘源的選擇原則下，選擇指定e1線路的恢復時鐘作為整個htc - 5200an節點設備的外部參考時鐘，從而解決了htc 5200an的中繼板卡由e1變為qe時所帶來的網同步時鐘源。 -
In the description of circuit design, the emphasis is paid the following hardware modules : ad / da inverter, dsp module, external program / data memory, cpld control logic, serial communication module, power module, and so on. problems and the corresponding solutions found in the design and debug stage are discussed, too. finally, the low - level software driver design is presented in detail, including system booting, initialization of dsp registers, cpld logic and timing control, drivers for asynchronous communication fifo, and drivers for ad converter
在電路模塊分析中，重點介紹了語音的輸入放大和輸出緩沖部分、 ad da轉換、 dsp語音壓縮解壓、外部程序數據存儲器、 cpld邏輯控制、串列收發組件、電源供電以及dsp的jtag介面等等，並且給出了在硬體電路設計和調試過程中的問題與解決辦法。 -
Registers an external component as part of the load process managed by this interface
將外部組件注冊為由此介面管理的加載進程的一部分。
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