Applied Data Systems Bitsy Plus, User Manual, Page: 8 / 68

Bitsy Plus User’s Manual
Page vi ADS document # 110114-1001A
3.3.4 J4: Manufacturing Test Connector............................................................................13
3.3.5 J5: JTAG Connector .................................................................................................13
3.3.6 J6: Input Power Connector .......................................................................................13
3.3.7 J9: External CompactFlash / Expansion Bus ............................................................14
3.3.8 J10: ADSmartIO, USB, Serial 1, Stereo Audio, I/Os ...............................................15
4 Feature Reference............................................................................................................................17
4.1 System Architecture.............................................................................................................17
4.1.1 Boot Code ..................................................................................................................17
4.1.2 Synchronous DRAM .................................................................................................17
4.1.3 Non-Volatile Memory ...............................................................................................17
Flash Memory.....................................................................................................17
ADSmartIO EEPROM ........................................................................................17
CompactFlash and PCMCIA/ATA Cards ...........................................................17
RTC NVRAM ......................................................................................................18
4.1.4 Interrupts....................................................................................................................18
4.1.5 CompactFlash / Expansion Bus .................................................................................18
4.1.6 SA-1110 GPIO Cross-Reference ...............................................................................18
4.2 Real-Time Clock (RTC) ......................................................................................................19
4.3 ADSmartIO..........................................................................................................................19
4.3.1 Overview ...................................................................................................................19
4.3.2 ADSmartIO Features .................................................................................................20
4.3.3 Digital I/Os ................................................................................................................20
4.3.4 Analog Inputs (A/D) ..................................................................................................20
4.3.5 Temperature Sensing .................................................................................................20
4.3.6 Keypad Scan ..............................................................................................................20
4.3.7 ADSmartIO Signal Cross-Reference .........................................................................22
4.4 Audio ...................................................................................................................................23
4.4.1 Microphone Pre-amps................................................................................................23
4.4.2 Audio Outputs: Speakers and Headphones ................................................................23
Connecting Speakers ..........................................................................................23
Connecting Headphones.....................................................................................23
Using Stereo Headphones and Speakers in the Same System.............................25
4.5 Data Communications .........................................................................................................25
4.5.1 Serial Ports.................................................................................................................25
4.5.2 USB ...........................................................................................................................25
USB Host ............................................................................................................26
USB Client ..........................................................................................................26
4.5.3 SPI Bus ......................................................................................................................26
Overview.............................................................................................................26
SPI on the Bitsy Plus ..........................................................................................27
Alternate uses of the SPI Port.............................................................................27
4.5.4 I
2
C Bus Master and SMBus .......................................................................................27
Overview.............................................................................................................27
I
2
C on the Bitsy Plus...........................................................................................27
SMBus.................................................................................................................28
4.6 Displays ...............................................................................................................................28
4.6.1 Display Types Supported...........................................................................................28