an I2

　　C， two channels of UART， and

　　plenty of general-purpose I/O ports

　?。℅PIO）。 There is a small OLED display

　　on the evaluation board. This 1″

　　bright yellowish panel is a fine-pitch

　　96 × 16 graphic display connected to

　　the LM3S811 through the I2

　　C interface. Unlike most LCDs， the OLED

　　display has a very fast response time，

　　which is ideal for displaying rapidly

　　changing oscilloscope

　　waveforms. A USB controller is also available on

　　the board for JTAG control

　　and serial port emulation.

　　The USB serial port emulation connection can be

　　used to deliver the captured waveform to a host

　　PC and show the waveform on a larger， higherresolution PC screen.

　　Finally， we developed a

　　small battery-powered

　　multifunction device with

　　the following functions： A

　　dual-channel oscilloscope

　　supports 250 ksps for each

　　channel. Each channel has

　　seven gain settings， which

　　allow the full-scale display

　　to be independently set to

　　±10 V， ±5 V， ±2 V， ±1 V， ±500

　　mV， ±200 mV， or ±100 mV.

　　The trigger method includes

　　Free-Running （Auto） modeastic box. The

　　e dual-channel

　　e other end.

　　This is the

　　he LM3S811

?