整理_5

PMU: POWER UNIT、PWR I2C I/F

• Power Manager I2C Interface / I2C Interface
  The PXA27x processor contains a dedicated I2C module for communicating with an external regulator. “I2C Bus Interface Unit” for a full description. The only differences
  between the power manager I2C (PWR_I2C) and the standard I2C interfaces are the register addresses.
  

POWER MICRO: SSP I/F

• It is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the MCU achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
• The SSP ports are a synchronous serial interfaces that connect to a variety of external analog-todigital(A/D) converters, audio and telecommunication Codecs, and many other devices that useserial protocols for data transfer. The SSP ports provide support for the following protocols:
  • Texas Instruments (TI) Synchronous Serial Protocol
  • Motorola Serial Peripheral Interface (SPI) protocol
  • National Semiconductor Microwire
  • Programmable Serial Protocol (PSP)
  The SSP ports operate as full-duplex devices for the TI Synchronous Serial Protocol, SPI, and PSP protocols and as a half-duplex device for the Microwire protocol.
  The FIFOs can be loaded or emptied by the CPU using programmed I/O or by DMA burst
  transfers.
  

LCM: SPI I/F、LCD I/F


燒錄BT mac address
mon>man bt 00:00:00:00:00:00
確認BT mac address
mon>man bt
00:00:00:00:00:00

Gerber out
RD畫電路→給Layout lay電路→PCB送洗

整理_4

CAMERA: IMAGE I/F、I2C I/F
1D/2D IMAGER: IMAGE I/F、I2C I/F
KEYBOARD: I2C I/F

整理_3

WLAN: SDIO
Micro SD: SDIO
GPS: FF-UART
DUAL UART: CPLD External Bus
MDOC: PXA270 External Bus
SDRAM: PXA270 External Bus
CPLD: PXA270 External Bus、JTAG

• CPLD is designed for both high performance and low power applications.
  This lends power savings to high-end communication equipment and high speed to battery operated devices. Due to the low power stand-by and dynamic operation, overall system reliability
  is improved.This device consists of sixteen Function Blocks inter-connected
  by a low power Advanced Interconnect Matrix (AIM).
  

整理_2

• BT/WWAN---DUAL UART

WWAN: FF-UART (2.5G / 802.20 )---GPRS、GSM : The FFUART supports modem- control capability. The maximum baud rate is 921,600 bps.

BT: BT UART---Handset、Handfree : The BTUART is a high-speed UART that supports baud rates up to 921,600 bps and can beconnected to a Bluetooth module. It supports only two modem control pins (nCTS and nRTS).





STD UART : The STUART supports all functions, but does not support modem-control capability. The maximum baud rate is 921,600 bps.





Features:


The UARTs share the following features:


• Functionally compatible with the 16550A and 16750


• Ability to add or delete standard asynchronous communication bits (start, stop, and parity) inthe serial data


• Independently controlled transmit, receive, line status, and data-set interrupts


• Programmable baud-rate generator that allows the internal clock to be divided by 1 to (216 – 1)to generate an internal 16X clock


• Modem control functions (nCTS, nRTS, nDSR, nDTR, nRI, and nDCD)


• Auto-flow capability controls data I/O without generating interrupts:— nRTS (output) controlled by UART receive FIFO— nCTS (input) from modem controls UART transmitter


• Fully programmable serial interface:— 5-, 6-, 7-, or 8-bit characters— Even, odd, and no-parity detection— 1, 1½, or 2 stop-bit generation— Baud-rate generation up to 921 kbps for all UARTs— False start-bit detection


• 64-byte transmit FIFO


• Complete status-reporting capability


• Ability to generate and detect line breaks


• Internal diagnostic capabilities that include:


— Loopback controls for communications-link fault isolation


— Break, parity, and framing-error simulation


• Fully prioritized interrupt system controls


• Separate DMA requests for transmit and receive data services


• Slow infrared asynchronous interface that conforms to the Infrared Data Association (IrDA)specificationAudio CODEC





WM9714: AC97

The AC-link is a synchronous, fixed-rate serial bus interface to thedigital AC ’97 controller for transferring digital audio, modem, microphone input (MIC-in), Codecregister control, and status information.

The AC ’97 controller and the I2S controller cannot be used at the same time.

整理_1

• WLAN 802.11d <不同區域的運作country selection>
  由於各國使用的射頻不同，802.11d主要解決在不同區域或國家透過此漫遊機制標準告知系統用什麼頻率來傳送資料以確保資料傳輸無誤




• MDOC開機流程
  起始位址：0X00000000
  開始會執行IPL(包含Start HOST boot process的code)，接著IPL會去Load Bootloader到RAM上執行，BootLoader會Init UART、SDRAM…，之後BootLoader會Load OSImage到RAM上執行。



• 70階=>板接
  75階=>組裝 80階=>包材



• A Band---802.11a (5G頻段，帶寬54M)
  B Band---802.11b/g (2.4G頻段，帶寬11/54M)
  5574 / 5504 b/g
  5590 a/b/g



• WWAN(Wireless Wide Area Network)
  是指傳輸範圍可跨越國家或不同城市之間的無線網路，由於範圍廣大，通常都需由特殊的服務提供者來架設及維護整個網路，一般人只是單純以終端連線裝置來使用無線廣域網路。例如：行動電話使用的 GSM(Global System for Mobile Communications) 通訊系統就屬於 WWAN。

WLAN 802.11d / WWAN~

1. 802.11d〈不同區域的運作 country selection〉。由於各國使用的射頻頻譜不同，802.11d主要解決在不同區域或國家透過此漫遊機制標準，告知系統用什麼頻率來傳送資料，以確保資料傳輸無誤。
2. WWAN(Wireless Wide Area Network) 是指傳輸範圍可跨越國家或不同城市之間的無線網路，由於範圍廣大，通常都需由特殊的服務提供者來架設及維護整個網路，一般人只是單純以終端連線裝置來使用無線廣域網路。例如：行動電話使用的 GSM(Global System for Mobile Communications) 通訊系統就屬於 WWAN。

• [1G] 第一代行動通訊為AMPS系統，這個系統提供了類比式的語音服務。
• [2G] 第二代的行動通訊系統改進為提供數位式的語音服務，並提供更嚴密的安全機制。目前較為普遍的三種技術為GSM, CDMA和D-AMPS。

‧GSM為歐規的系統，採用TDMA 的技術，是目前世界上使用者最多的系統。

‧CDMA 系統採用code division 的技術，佔有亞太北美的市場。

‧D-AMPS 則是改進第一代行動電話系統AMPS 所制定的數位系統。

• [2.5G] 功能與傳輸速率介在第二代和第三代行動通訊系統之間的通訊技術，泛稱為2.5代的系統。 所謂2.5 代的系統, 主要是改進原本第二代系統只提供單純的語音服務與少量的數據服務而設計的。 因此2.5代的系統並不是一個獨立的系統，它們皆是架構於原本2G 的系統，利用原本2G 系統的基礎結構(infrastructure)，提供較高速且大量的數據傳輸。 因此從無線電通訊技術的觀點來看, 2.5 代的系統算是第二代技術的演進(evolution), 而非像進入第三代是一種創新的革命(revolution)。 架構於GSM 的系統之上, 稱得上是2.5 代的系統, 包括HSCSD, GPRS, EDGE。
• [3G] 發展3G 是起源於ITU (International Telecommunication Union) 的會議WARC (World Administrative Radio Conference), ITU 從1986 年開始, 便開始研究如何達到下一代全球個人通信(Global Personal Telecommunication) 的目標. 其內容包含陸地上通訊與衛星。

語音信號處理

語音信號的處理流程：

語音信號輸入
↓
數位取樣 → 類比轉數位(類比信號→取樣→量化→編碼→數位信號)
↓
標準化→將原始語音信號做等比例的放大或縮小，使其取樣值都落在同一範圍中。
↓
取音框→短時段被單獨處理的語音信號，等性固定。
↓
端點偵測→將語音前後靜音部分去除，讓辨識結果較正確。(能量量測、越零率、折返率)
↓
預強調→利用高通濾波器，補償衰減掉的高頻部分。
漢明窗
↓
特徵參數求取→(線性預估編碼、倒頻譜係數、濾波器組)
↓
特徵參數輸出