Eurotech BitsyXb - Page 4

BitsyXb - User Manual
4 110118-0001A
4 Feature Reference ........................................................................................................................... 23
4.1 System Architecture ............................................................................................................ 23
4.1.1 Boot Code .................................................................................................................. 23
4.1.2 Synchronous DRAM ................................................................................................. 23
4.1.3 Non-Volatile Memory ............................................................................................... 23
Flash Memory
ADSmartIO EEPROM
CompactFlash and PCMCIA/ATA Cards
RTC NVRAM
4.1.4 Interrupts.................................................................................................................... 24
4.1.5 CompactFlash / Expansion Bus ................................................................................. 24
4.1.6 PXA270 GPIO Cross-Reference ............................................................................... 24
4.2 Real-Time Clock (RTC) ...................................................................................................... 27
4.3 ADSmartIO .......................................................................................................................... 27
4.3.1 Overview ................................................................................................................... 27
4.3.2 ADSmartIO Features ................................................................................................. 28
4.3.3 Digital I/Os ................................................................................................................ 28
4.3.4 Analog Inputs (A/D) .................................................................................................. 28
4.3.5 Temperature Sensing ................................................................................................. 28
4.3.6 Keypad Scan .............................................................................................................. 29
4.3.7 ADSmartIO Signal Cross-Reference ......................................................................... 30
4.4 Audio ................................................................................................................................... 31
4.4.1 Microphone Pre-amps ................................................................................................ 31
4.4.2 Audio Outputs: Speakers and Headphones ................................................................ 31
Connecting Speakers
Connecting Headphones
Using Stereo Headphones and Speakers in the Same System
4.5 Buses and Data Communications ........................................................................................ 32
4.5.1 Serial Ports................................................................................................................. 32
4.5.2 USB ........................................................................................................................... 33
USB Host
USB Function (Client)
4.5.3 Synchronous Serial Ports ........................................................................................... 34
Overview of Synchronous Serial Ports
SSP on the PXA270
SSP on the BitsyXb
4.5.4 I
2
C Bus Master........................................................................................................... 35
I
2
C on the BitsyXb
4.5.5 Secure Digital (SD/SDIO) and Multimedia Card (MMC) Controller ....................... 37
4.6 Displays ............................................................................................................................... 38
4.6.1 Display Types Supported ........................................................................................... 38
4.6.2 LCD Voltages ............................................................................................................ 38
4.6.3 Display Signals .......................................................................................................... 38
4.6.4 Creating Display Cables ............................................................................................ 38
4.6.5 Developing Display Drivers ...................................................................................... 38
4.6.6 Brightness Control (Backlight) .................................................................................. 39
4.6.7 Contrast Control (Vee and Vcon) .............................................................................. 39
4.6.8 Touch Panel ............................................................................................................... 39